Help with light install

Ok so I have searched granted I'm not the best at computers and such. Anyways I can't find a how to on aux light install I'm sure it's there somewhere.

I got some lights from my dad and a wiring harness I just don't know how to wire it up.

black goes to the headlights cause it splits into two.
Red battery
Blue ground?
Yellow I assume I splice into the green for the switch
Extra blue wire is for switch ground?

I think but also what goes on the third prong of the switch

And what the hell is this blue connector for??

Thank you. Did I mention I hate wiring anything!

q

What brand of lights ? Been to their website ?

I would throw out everything but the switch, and wire the lights correctly using a relay.

The third lug on the switch is probably for the ON indicator light in the switch.

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He gave me a set of PIAA and two sets of KC. The wiring should be the same no matter which light I use correct? I was going to swap them out until I find the set I like. Also thank you. This harness does have a relay I just didn't put it in the picture

The wire going into the relay number will tell you what it does by looking at the diagram above. The blue connector are meant to tie into a wire, don't use them they are junk, splice in and preferably solder. Also, I would cut out those inline glass fuse holders and use an atc fuse holder.

Ok, so in the switch how will I know which two are power supply and which is ground? If I test for continuity only two should have continuity?

Thank you this is all helping me get closer to my goal.

Power to "off" terminal of switch. Switched "on" continuity. A circuit breaker or fuse between a power source and switch is also a good idea.