Mounting PM-3000 Intercom

[Vlad]

I am looking for ideas how to secure my PM-3000 behind the panel. I plan to mount it vertically to the right of radio/txp stack, close to 745-R rib on Vans precut panel. The intercom case, if positioned vertically, is 5 1/2" deep by 3" tall and I think the two 4-40 screws from the front cover and wire bundle support clamp behind the connector will not hold the vibrating case. I am thinking of some kind of straps around the case but have no clue as of today... any ideas from those who were there?