Originally Posted by EKS PYB

No, no need to route a wire. The connector is already back there.

Write up can be seen here

If I remember correctly, it was around $38+ for the mounting kit.

You can see the illustration here

E53 without Nav Hardware Kit P/N 82 11 0 009 302

Everything in that illustration came with the kit except #1 which is the main backing. Everthing, all parts and screws came all prepackaged in one box.