Questions about Gorilla Sports Pull-up bar

Hello. I think the part is screwed together incorrectly in the pictures. The rod should probably be screwed onto the wall mounting? With your mounting method, the load on the two screws wrs. far too high.... Greetings

what are the dimensions of the mounting plate (WxH)?

Would it also be suitable to screw into a load-bearing wooden beam instead of a concrete wall?

Exact masses? How big?