Abstract: A pair of upright wall panels are each provided with a sidewardly spaced pair of generally parallel but inclined guide grooves extending vertically along the outer face of the upright frame edge rails. A connector assembly including a main activator rod having a pair of wedge members threaded thereon in spaced relationship therealong is positioned between the opposed upright edge rails. The wedge members have wedgelike edge flanges which protrude into the grooves of the opposed upright edge rails. Rotation of the activating rod causes the wedge members to simultaneously move relative to the rod in opposite directions to effect gripping engagement with the groove walls to simultaneously effect a drawing together of the edge rails and alignment thereof.