bought the power plus 20 wirirng kit for my 48 gmc, need to power fuse box, there is a red wire that says 12 v battery and it tells me to hook to batt. terminal to ignition switch, i already ran a wire from positive post to batt. on switch, not sure if this is right, or can i hook wire that say 12v battery to ignition2 on switch...also feed for headlight switch, where to get power for that?