I am installing my just received MVA-12L with a JVC head unit (GPS) and following instruction sheet. On blue antenna pwr lead and blue Amp remote lead, your instructions show separate leads, but my kit came with MVA leads joined into one connector (both are blue/silver dashes). Where do I attach the blue/white lead for head unit Amp remote? all four into one connector? Also, your Appendix C schematic indicates SPD as White/Red, but on my Lexus the #4 lead is yellow (normally a power lead?) and the PKB #15 is only red, not Red/Black. Do I go ahead and ground the #15 red wire to chassis? do I still cut the #4 position yellow wire?