Wall mounting plate for this excellent 4 channel relay. Designed to fit a 230 mm wide print bed. In my case, I flashed it with ESPHome and using it for a garage door opener so wanted the width to hide the holes in the drywall from the OEM remote openers.
Fairly tight friction fit for the relay case so you may not need screws to fix the two together but if you want them, you can use M5 x 15 mm screws. You could also use double-sided tape. Prints without supports or a brim.
Includes a slot for the wires and a cover for that slot to hide the mess. May help to thwart nosy home inspectors. Cover is held by M1.8 screws. You will need supports when printing the cover due to the massive overhang. Might also want a brim. I did both.
Held to the wall using #8 screws and wall anchors.
I have a remix that eliminates the wire slot if you prefer that.