Who else hates buying a used vehicle with poor wiring modifications done to them, such as cutting or tapping into the main wires?
Those are the vehicles that have mysterious electrical problems, symptoms affecting several electrical systems.
Do not touch the main wires of the fuse panels, dash, or under hood Power Distribution Box. Only tap into smaller support wiring, find an existing electrical circuit which has the type of wiring needed, and can handle supplying extra current from the existing fused circuit.
That is why I suggested the existing auxiliary fuse box under the air cleaner. I'm not familiar with a Ranger, but all 95-01 Explorers have that relay box. For fog lights, either the wiring is there, or at the least there is an unused relay socket which you can add OEM wires to.
The best way to add circuits is to find an opening in your PDB, then go find a used vehicle with that location used already, and remove and buy those wires/fuses/relays. Those components directly plug into your vehicle, with no cutting of wires.