This baseplate is designed for adjustable mounts in corner areas, featuring a 1/2" wide extension with variable length measured from the underside of the mount.

It installs in corners with 1/2" wide trim, allowing the swivel base to overhang. The screw holes are offset 1/4" from the edge. If the area is flat and the screws fit within 1/2" trim off the wall, this adapter plate will work. It can also be customized with a small angle.