Contents: Metal knobs with holes, Washers, Locking plate.
Remove the locking nuts of the access door with a pipe wrench or a socket wrench.
First insert the washers and then the metal knobs of the retrofit kit.
Reinstall the locking nuts at the end of the access door screws.
Place the locking plate on top of the metal knobs.
The access doors can now be secured with two padlocks (not included).
Installation Video Lockable Access Doors