Looking at the upper face of the trim that fits.
Installing recessed lighting trim.
Reattach to mounting assembly.
Cut the hole with a drill with a hole cutting attachment and mark all light locations.
Position a stepladder for access to the recessed light fixture where the trim will install.
Make sure you do not snag any wires that may be in the ceiling cavity.
Set the bracket on something hard like cement wood is too soft and hammer the lip flat just around the light socket hole.
How to install recessed lighting trim.