An electrical connector assembly includes a plug assembly for mating with a header. The plug assembly includes a plug housing and a lever, where the lever includes gear teeth which cooperate with a tooth on the header in a rack and pinion fashion. The lever is locked to the plug housing when the lever is poised for the plug housing to be inserted into the header. A release member on the header releases the lever from the locked position allowing the lever to be rotated to the position where the lever gear teeth mesh with the header tooth, to draw the plug assembly into the header.