Weird cable

I didn't think about asking this list until the string of messages about cables, but here is a weird cable I would like to have indentified. Shrink wrap sleeve says, 528-0000401 REV. C M.A.C. 10-28-94 Main connector has two cables out the back, end of each is marked A or B. Main connector I think is a SCA backplane connector (male sort of wide, but squished centronics looking thing except higher contact density). A and B connectors are the size of a DB25, but have sparsely populated 3 rows of pins (HD50 maybe?). Each cable has this brand type marking too; C & M Corp (UL) CL2 28 AWG 75 C - - - LL33361 CSA AWM I/II A/B 80 C 300V FT4 Ideas? Anybody need some I have 18 still in the original bags. I am generally willing to look for any other weird cable too.