Its easy to say to not be afraid of electrical work when i deal with 480VAC three phase at work, sometimes 4160VAC also. 12 VDC is like dinner mints. Easy, put +12 VDC on one side of each switch, (place a fuse between the battery and switch also) and then attach the other side of the switch to your positive side of the load (light, stereo, etc. Then the - side of the load goes back to the - side of the battery. Simple series circuits.Looks awesome!!! I envy you guys that are good with electrical. I'm to chicken &@!# to try.