Abstract: Two plugs each comprises a pair of plastic guide plates with inner sides in which are formed duplicate groove patterns each consisting of parallel V-sided spaced grooves running through the plugs and divided into a central set of smaller "fiber" grooves and a pair of larger "pin" grooves on opposite sides of and spaced from the pin grooves. The two plates in each plug are disposed with their respective groove patterns registering with each other across a transverse gap such that the fiber grooves define a set of fiber channels extending through the plug from its rear to an end face on a front nose on the plug, the pin grooves defining a pair of pin channels having front openings rearward of such end face. Optical fibers from a ribbon type cable extend through the fiber grooves to the front of the nose.