Good video but it is essential that the middle two plastic screw threaded inserts on the cab are removed so that the plastic posts on the x3b go into those holes otherwise they will break trying to get them in. Also, mine is a 2020, so the inner wire clamp utilized the holes closest to the large opening. The posts of the clamp were white and I had to cut them to release the clamp and pull the line with the connection on through. DO NOT let go of the line otherwise it will fall inside the cab.
It’s really misleading and irresponsible of him to make this video without mentioning this…it’s a pretty big deal. Thank you for picking up the ball that he dropped!
the pine tree posts went right in once the black factory inserts were removed. I also just plugged the tail light into the stock wiring and it worked just fine. Not sure why they have you unplug it further down.