I have this connector that connects 2 50 pin cables together. The opposite side is also male. The pin spacing is 0.1". From my research it appears to be a IDC50 SCSI connector, but I have been unable to locate any types of these connectors or cables that are male to male. If I am correct, what are some additional search terms that I could use? I already tried to use the term coupler or male to male, but neither returned any results.
That's a made-up adapter, that swaps the even and odd wires of a 50-position ribbon cable. Note that the one side's polarizing notch is on the lower pins, and the other side-s polarizing nub is adjacent to the upper pins. That's a wiring no-no, it won't connect pin 1 to pin 1.
A real ribbon cable coupler would have latches to secure the cables, and provision for connecting to a chassis, not just bare conductors.
Probably, the less-visible side just has the ends of wire-wrap pins poking through a mismatched plastic shell part.
Couplers for two-row SCSI feedthrough (male/female) only used back-to-back connectors in conjunction with a U-shaped flexible wiring board (and usually contained terminator resistors). The wiring board did the top/bottom swap so pin 1 side A DID connect to pin 1 side B.
I've never managed to find a source of back to back IDC connectors to extend IDC cables so I just made some small PCBs with two male connectors to solve this problem.