Kenwood Z828MP Instruction Manual page 53

Screwing the Faceplate on the Unit
If you want to fasten the faceplate to the main unit so that it
does not fall off, screw in the provided screw (M2 ´ 3 mm) in
the hole shown below.
Accessory4
2CAUTION
Never insert the provided screw (M2 ´ 3 mm) in any other
screw hole than the one specified. If you screw it in another
hole, it will contact and may cause damage to the mechanical
parts inside the unit.
— 53 —