i got a console at the junkyard off a Berlinetta with t-tops,my car has t-tops to but came with the dome light only.How do i wire this up?the dome wiring has a 2 wire connector and the overhead one has a 4 wire connector,should i have pulled the 4 wire connector off the Berlinetta?.Do I just splice after the connector on the overhead one?Also what about the purple wire?I don't know what it controls.Thanks