I'm installing an aftermarket JVC HU c nav...& it calls for hook ups to reverse, e brake and speed sensor(vss).......Now, I've noticed an oem wire harness 7 pin clip that hooked into the old oem JBL (the "mother board of which just blew, so I'm told by the repair guy, and thats why I'm replacing it).....That 7 pin clip has only three wires...red/black, purple/white, and red/white.....my question is ...can I assume that these three wires correspond to the reverse light, speed sensor(vss), and e brake respectively?? these wires are right there ready to splice into.. and would keep me from searching for wires behind the kick panel, instrument cluster, behind glove box, etc.... ..any feedback /help would be much appreciated.....thanx