Mounting Motion detector

I’m trying to install my motion detector. Was it supposed to come with a mounting bracket? The back does not have screw holes and I dont see a compatible Mounting bracket. Apparently it is too high tech for me.

Yes it supposed to come with a bracket. I dont use the bracket myself, and corner mount. There are punch outs in back plate, drill through them. Only use one side or the other.

If it is a 2GIG motion detector, Rive is correct. Is it by chance a RE210? If so this thread may help -

Thanks rive wasn’t sure if I should drill through or not.
Yes Amanda it’s the 210. Thanks for the link.