VEVOR BT-RTR08-DCG Bedienungsanleitung Seite 7

We recommend that the inner diameter of the four small holes on the
outside be 6mm The inner diameter of the central hole is 209mm.We
recommend that the central hole be drilled through the entire wall and into
the adjacent room.
STEP 3
Insert the plastic expansion screw into the hole through 4 small holes
STEP 4
Place the rear faceplate template in the center hole of the wall in the
adjacent room, ensuring that the center holes of the wall and rear faceplate
templates are aligned. Refer to the rear faceplate positioning and mark four
installation points and center holes on the wall again.
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