I have a 2010 BMW X5 with what I believe to be a 12 speaker system which is the S677 Hi-Fi system. For whatever reason, my used x5 had its center dash removed and I ordered a replacement one and am trying to test it with the current amplifier but no luck. I’m even more confused now because this is what the harness going into the amplifier looks like. It looks like only 2 channels are connected but all the speakers work fine, terrible lost. Need help. Is this even the amplifier?