outline test print and hole template provided for ease of use. I just ended up screwing the alignment jig right to the wall and leaving it with the four small wood screws I had around. You could clip it off if you feel ambitious but it feels very solid as is.

I printed mine without supports on my P1S and it only snarled up a little on the upper corner-tips of the finger holes. I'm calling it good enough for now. You might want to try using supports just for those two points to keep them crisp but it'll probably be fine without.

The alignment jig is slightly wider in one axis, hold it up to the wall holder to double check the hole spacing before you commit.