All the previous post on installing a sub woofer talk about either a 14 pin or a 12 pin amp connection. My 2005 X5 does not have DSP or Nav. The connector at amp is a 48 pin harness BMW 8 364 862. It has 4 heavy gauge twisted pairs, 10 light gauge twisted pairs, a red, brown, and white single wire. The harness has 2 sub connectors one gray and one black. The gray connector is bmw part # 8 364 006 and the pins are numbered from 1 to 13. The black connector is BMW 8 364 882 and is numbered from 22 to 34. Can anyone help with the color code / pin out on this?

Thanks
Bruce