The present invention relates to an assembly (111) for motor vehicle equipment comprising: an electric motor (3), a fixing plate (11) to which the electric motor (3) is fixed at least at one attachment point (14), the said fixing plate (11) comprising: at least one fixing point (20) intended for the fixing of the fixing plate (11) to an element external to the assembly (111), such as a structural element of the vehicle,
in which the fixing plate (11) has at least one slot (25) associated with the fixing point (20) and distinct from the associated fixing point (20), the said at least one slot (25) extending over at least part of the thickness of the fixing plate (11).

The subject of the invention is a windscreen-wiper device (1) for a front glazed panel of a motor vehicle, comprising at least one motor unit (2), drive means (4) and a support plate (10), said motor unit (2) comprising first fixing elements (12) capable of interacting with second fixing elements (13) provided in the support plate (10) so as to adopt a position of locking by insertion then rotation of a quarter turn about the axis Z of the drive shaft (3) of said motor unit (2).