Hello. I have a set of power folding mirrors that I'm trying to install. I have figured out there's two wires for the folding, one wire makes it fold in, one wire makes it fold out but, my problem is one wire has to be grounded in order for the other wire to work.. how would I be able to wire that for each wire to switch between negative and positive depending on how I have the two-way rocker switch positions? Hope this makes sense! Thanks for any help!