See the attached photo showing how I've schemed Cable Stain Relief on this 12" 12 plug Feed Thru.
There are holes on the perimeter of the Shroud allowing an all thread to pass between cables.  The red cable conduit protects the cable from the threads.  All cabling should get strain relief and there are a lot of cables on D6(SW Corner) none of which have any relief yet.  There are still a lot of cables yet to be plugged into D3(PRMs.)  If anyone objects to this scheme or thinks installing these should wait until... please let me know.