We are having the exact same issue, the new rbc looks a lot sturdier than the previous one, but the passtrough makes plugging-unplugging a real pain.
I tried finding some coupling that would work well with the 922 without any success.
We did a somewhat janky setup on a test location with a laird rj45-ecs in the passtrough, so that we have a functionnal connector outside the box, functional but somewhat scary
If anyone has a good solution that would make me reeaaal happy!