Homelink/compass retrofit

[momox5]

Hi everyone, I did a ton of searching on this and unfortunately can't find anything specific to the e70 that could help. My 2011 X5 has a ton of options that make daily use of the car very convenient but one that I don't have and has been bothering me for all these years is the homelink mirror. I got one from a 2013 e70 on eBay and from what I read the wiring is all there. It turns out that is not the case in mine (68k msrp and not even autodimm mirror!). There are retrofit kits for the e90s and X1's even e30's but nothing that I can find for ours. Anyone know how to do it or even where to find wiring diagrams for the mirror? The harness to the windshield has four wires only, 2 go to the rain sensor and the other to go to the mirror connector for the led light. The new mirror I have has 7 pins in the connector.

Any help is much appreciated-thank you