Surface Pro 4 (and 5) wall docking station

Print one as is and one mirrored. The opening for the connector slot pointing up (Z+) to avoid supports.
Place charging connector in the round slot and tighten screw. If you want a longer support to the charge connector - scale the appropriate axis a bit extra. It´s working perfect as it is seen on the picture, stable and smooth connection.

Works good without charger as well.

Enjoy!