connector that is known per se the plug connector 12 may contain what is referred to as an mt plug pin 14 mt ferrule as a coupling element as is described for example in the reference u201c lightwave u201d nov 1997 pages 61 to 67 a plug pin 14 terminates an optical waveguide 15 16 which is illustrated only indicatively at its end face 18 such that it is ready to be coupled as shown in fig1 a tongue 20 is a component of the shielding plate 4 and is angled essentially at right angles to the through opening 6 the tongue 20 has an aperture or an opening 22 whose unobstructed width is dimensioned to correspond to the cross section of the front face region plug pin 14 of the coupling partner 12 when the coupling partner 12 is inserted the opening 22 is thus completely filled by the plug pin 14 the electrically conductive shielding plate 4 extends out of the sleeve body 1 at both ends of the sleeve body 1 and in each case has a connecting lug 26 27 the shielding plate 4 can be electrically connected to the desired shielding potential via the connecting lugs.