This Switch 2 wall mount/dock comes in two parts.  Simply slide the controller holder home and press the two firmly together.  I have tried my best to leave most of the vent holes in place and to that end, have also printed two spacers to sit it proud from the wall (suits my situation as I have trunking to hide the wires anyway).

Place the power and HDMI wires in their slots and then slide the back of the Switch dock in place before placing the dock into the holder. There is no actual holder/clip/fitting to hold the dock to the wall mount but the fit is secure and tight.

Enjoy!