a connector engaging / disengaging device comprises a plurality of carrier plates , a pair of side blocks , and a pair of sliders . each of the carrier plates has lock springs holding cable connectors thereon , and a pair of engaging bosses engaging with the sliders . the sliders have slider grooves engaging with the bosses . each of the side blocks supports each of said carrier plates slidable in vertical direction , and guides each of said sliders in horizontal direction , and supports a printed circuit board having mating connectors thereon . when the sliders slide in the horizontal - direction , slider grooves of the sliders push up or down the carrier plates to connect or disconnect cable connectors to the mating connectors .