How much draw can I put through a DS Low Voltage Cut-out?

After reading about it in the archives I have purchased a DSE Low Voltage Cut-out kit (K3124). I have not put it together yet but I wonder if one of the electronics gurus can give some advice.

My primary intention was to connect it on the accessory plugs at the back of the Troll where the fridge runs. I have run a dedicated cable from the battery to the 2 outlets at the back and started to wonder whether it is best to locate the cut-out unit at the back near the fridge or under the engine bay near the battery? If there is no difference my preference would actually be for in the engine bay so I don't take up space at the back and also it would be easier to get to.

The next thought was how many accessories could I run through the cut-off unit? I have a second cable direct from the battery which powers another couple of ciggie plugs under the drivers seat and a 300W Pure Sine Wave inverter (also under the seat).

Would I be pushing it to route all of these accessory wires through the cut-out unit (would be easy if it was under the bonnet near the battery) or is there too much current etc? The specs of the kit do not address the subject. Each cable is separately fused at the battery and they are heavy gauge.

As mentioned, I bought it initially just to go at the back for the fridge but if it can cover more with no problems then why not?

Thanks in advance for advice

Trevor