The Amphenol L717DE09P is a standard D-sub plug with 9 machined male pins arranged in two rows, terminated via solder cups for free-hanging (in-line) cable assemblies. It belongs to the D series of D-subs, a workhorse interface for serial data, instrumentation, and control signals where the DE-9 shell size is the de facto footprint.
Termination is solder cup — strip the wire, tin it, and solder into the cup. The machined brass contacts with gold finish accept 20–28 AWG stranded wire typically; the solder cup gives a reliable gas-tight joint when properly fluxed. The steel shell's grounding indents contact the receptacle shell before the signal pins mate, dumping shield current to chassis ground.