I am putting a 7 way plug on my 1997 Suburban and I have a question about some "extra" wires that exist. I have 5 of the 7 wires properly wired and all of them check out via test light and volt meter. There are 2 wires that remain and I do not have anything to wire them to. One wire is labeled "Auxilary power source" and the other is labeled "Electronic brakes". The trailers I use, one is a standard 4 prong plug (3 prongs plus ground), the other is a tandem axle bass boat trailer that has hydraulic brakes and has a 5 prong plug (4 plugs plus ground) that is ran into a plug/socket that goes into the 7 way. Are electronic brakes those devises that people have mounted in the cab of their trucks to assist in braking? If so I don't have that and what do I do with this wire? Do I just cap it and tuck it way. Same goes for the Aux. Power Source. I don't have this on my truck (that I am aware of) and so do I do just the same and cap it and tuck it away? Thanks for your help!