I have just hooked up my 40” LED light bar on the front. I have a !0” that I am moving to the back for a back up light. What I would like to know is if I could Hook up both lights to one toggle switch with a on off on or do I need the 2 switches. Also with all the add ons that need power should I add a buss bar? And do they make a buss bar that lets power through when the key is turned on?