12 Volt Batter Hookup Question

Put red tape on the wires to the + terminal and black on the - terminal wire. Then remove and clean the lugs and battery post. When you figure out what the white wires are for then add colored tape to them especially covering the colored lugs, attach and take a picture.

With a new rig I start taking pictures of anything I can see, wiring, equipment, labels, etc and keep them in a backed up file. Great reference material.