Derived/Remixed from my wall mount for FRITZ!Box 4040/6430 Cable/7362 SL/7430/7560, I also offer a mount for the 7530.
Take two M4 nuts and put them in the freezer. After 10 minutes, they should be cold enough to perfectly fit into the corresponding hexagonal holes. Add super glue if necessary. From the reverse, screw two M4 screws (e. g., M4x12) in until they line up perfectly with the nuts. Secure with super glue or two-component adhesive. Mount to the wall using wall plugs and screws (7 cm apart) or double-sided adhesive tape.