Resolving instrument cluster issues and found quite a mess. I need the 15 pin wire assignments 'cause I know they're not right as is. The 240d assignments are not the same. Anyone?

Also, what is this pin next to the bottom right of the square black box in the back right corner of this cluster? It's not threaded and appears to be an electrical connector of some sort, but so far don't see a spare wire for it.