When rear space is a concern, stick it all out the front!
In something akin to a reverse mullet, this front-mount panel mount has all the action right up front, with strictly business in the rear.
NM3FD-B is a 3 pole XLR female module, D-shape, black plated, solder contacts.
Use it when constructing adapter boxes, in conjunction with NA-HOUSING extrusion kit by Neutrik.
For a more traditional D-size female 3-pin panel mount:
NC3FD-LX 3 Pin Female XLR Connector (panel mount)
NC3FD-LX-B 3 Pin Female XLR Connector (panel mount, black w/ gold)
NC3FD-LX-M3 3 Pin Female XLR Connector (panel mount, M3 threaded)