Hi. I am Jim Lassen in the UK, the wiring moderator on here and I know alot about the SSL 4 and 6K console wiring. I also worked at SSL for 7 years (1980-87) in the early days.
I am currently having problems with my newer iMac computer at the moment but can help you out to some extent.
In which Country are you based and you are welcome to call me on Whatsapp so I can guide you through this.
For now, I can state that:
DL33 is almost the same as a 4k with the echo returns and sends, LS stuff and cue feeds using up about the first 26 circuits of the DL.
DL32 is always the stereo sends and returns for the first 20 circuits but the 6K has the 4 track record and replay on there as well.
DL31 is rarely used on a 4K but on a 6K has the 8 track rec and replay on the first 16 circuits plus Disc, Prog L,R and Mono and VTR and Air on.
More details to follow ideally but I can't seem to do a screenshoot of the many pinouts I have at the moment which are all wiring views of the rear of a DL plug to help with wiring installation which is what I do!
The best thing to do is to unscrew those 3 DL's (which are secured by M3 x 10 pozi pan screws) drop them down a bit and read the labels which mostly refer to the patchbay jack positions. For example if the white sticky label states N37, that means it is patchbay N/P and is jack 37 on row N (the top row).
The Alternative speaker and redlight relay contacts (normally 2 pins) may be on any one of these 3 DL connectors, along with the Listen Mics (1 or 2) so, every console (4 or 6K) can be different. The listen mics will be refered to the patchbay jack points and are half normalled into the 651 Compressor cards (82E33?) but the red light and alt relay console connectors will have labels which are Z01 and Z02 for example which come from one of the 104 way Mrac (M1 or M2) connectors at the centre section 651.
Hope this helps for now and get back to me. My website is down and being re-constructed but the email and mobile phone details are correct.
Check out my Facebook wiring page with some examples of some of this wiring stuff and get back to me.
Jim Lassen in the UK