I downloaded a 45 degree mount on here but it didn't quite line up right with the mounts that came with my ARLO Pro kit so I kept the original idea but started the model from scratch.

Use the metal ball mount included with your camera and a couple screws. I grabbed a short screw to put in the the face of the mount and a longer one to mount it to the wall.

Designed in Fusion 360. Printed on an Ender 3.

.2 mm layer height

10% infill

no supports, no raft, no brim