105 series fog light wiring!!

Any Toyota factory cabling for headlights or spots will be insufficient for any serious light output, even if you clean out the years of mud and crap that has capilleried up the inside of the cable.
Do yourself a favor and run new heavy duty cabling.
You can use the original cabling as a signalling wire for a relay.

(speaking with the experience of owning candles disguised as a 90 plus a 100. Both now fully rewired.)

I agree with Malcom

Run new wiring. Then you can be sure it is the right wiring for the lights that you have.

Phil