Looking for parts/info

It's not very much disassembly. There are three cabinets that outwardly look nearly identical, and there is some variation between KL models as to what is installed in each cabinet. One of them is the console processor cabinet, containing the PDP-11/40 front end, and you won't need to do anything with that one. The main CPU ("APR", Arithmetic Processor) is usually in the rightmost cabinet as seen from the front. There's a 54-slot backplane full of ECL modules. Since that dissipates a lot of power, there are air ducts above and below it, not found in the other cabinets. The backplane is mounted to the front side of the cabinet, so module access is from the rear side. IIRC there's a metal cover with captive screws over the modules. If you remove the cover, you'll see that most of the modules are hex height with metal ejector handles, but slot 1 (rightmost) has three dual height paddle cards with cables attached and magenta plastic handles. In slot one, the top position (AB) should be a BC11A cable with M919 paddle cards, as would be used for Unibus, though in this case it's not being used for Unibus. We don't need photos of that one. In the next two positions down (CD and EF), there should be BC20C cables with M9006 paddle cards, which are the ones that Guy needs photos of. There probably aren't any wiring differences, but just to be certain, I'd recommend getting photos of both sides of both M9006 paddle cards, and also getting photos of both M9006 paddle cards at the other end of those cables. The other ends should be in slot 37CD and EF (leftmost) of the RH20/DTE20 backplane in the "I/O cabinet" (the one that doesn't contain the PDP-11/40 front end). If you can get photos, I'd appreciate getting copies of them.