Just seen this post (I am the wiring Moderator here and worked for SSL for 7 years)
Brief reply as I am busy with other stuff.
The 5 x stereo feeds appear on the patchbay, half normalled down to various 2 tracks but are ALL paralleled so if ONE is unbalanced, it will unbalance them ALL so be careful.
DL 32 is the connector involved of course but I haven't got time to look it up now to advise you but have the pinout here, although it changed a bit over the years after the 4 and 6K consoles.
Look at your patchbay (J/K and L/M to see what is there and message me if you have a problem.
Good luck and this should be an easy fix. Jim Lassen in the UK.