Plugs

I have tried both cigarette lighter style & Hella type plugs, personally I would suggest to get the Engel vehicle wiring kit & use that, because it is secured with a threaded retaining ring, the plug can't vibrate, or get knocked out.

Evening GXLPRADO,
I receintly wired up a dual battery system in my Trol and put an outlet in the rear to run a fridge. I wasnt happy with the connection of the original lead and how easily it came out. What I've adopted is using the 50amp anderson plugs and modifying the fridge to use the same. I mounted the anderson plug at the back corner of the vehicle then another anderson plug on the back of the fridge itself and made a 1 metre lead up with the anderson plug on each end. I left the original connections on the frigde so the original lead can still be used if I want to use the fridge in another vehicle but the anderson plugs give a good secure connection when we travel.
Just how I decided to over come the problem of the plug coming loose when I bumped it a few times.
Good luck.. Hope that gives you some food for thought..

A lot can depend on if you think you may use the fridge in another car, or someone borrows it from you.

Call me a tightarse, but I don't plan on letting anyone use my fridge, it's worth more money than most ppl want to dish out if something goes wrong.

I have put two, 2 pin low voltage caravan plugs in the rear of my Patrol, plumbed into 6mm cable thru a circuit breaker near the battery, and everything I run on 12 volt has these plugs (fridge, fluro, compressor).

I have not cut the lead to my fridge because the waeco needs to run from a 12V adaptor when being used at home, so I made up a lead about 4 ft long with the 6mm cable, a female cig lighter plug and male 2 pin plug. When we are camping, it doesn't matter where I put the fridge, on the front seat (for sleeping in the back) or on the ground out side, the lead is long enough.

The 2 pin caravan plugs will not rattle loose, you have to physically pull it out of the socket, are easy to wire up, will take heavy wire and do not require soldering.

The "Merit" or Piranha plugs and sockets are a practical solution. I "modified" the Engel cable by fitting a merit plug on the end of the cable which plugs into a corresponding socket in the rear of the car.

This style of connector is the same as that fitted to the "Thumper" portable battery pack. I can swap the fridge over from "in-car" to "Thumper" when I want to store the fridge in the camper's annex.

The Anderson connectors are also an excellent option, but they are more expensive to buy, not quite so simple to attach to the end of a cable and are not "universally" adopted for accessory use. I use the Anderson connector to attach the Thumper to the vehicle's charging system.

As mentioned often on this forum , boat shops are a good source of electrical parts . Boat equipment is better quality than automotive and is usually cheaper . For the rear of my Disco I installed a mini switch board and separate plug outlets . The plugs are heavily constructed chrome plated brass with screw locking rings . I modified the Engel chord to suit .Try www.biasboating.com.au

I rewired my engel plug and put on a 2 pin 32 volt plug. I have been using these for years and have never had a problem with them. I have them in the car (inside and out) and boat (which isn't kept undercover). I have wired up any accessories I have with these plugs and also made up a couple of extension leads and a power board so I can move the light or fridge to where ever I want, instead of being tied to the vehicle. I don't like dick smith and I buy them from electrical stores/suppliers, however he does have a picture of them on his site. part number p2500 and p2501.