a recessed central part surrounding the head of the fastener and a flatter annular part therearound and in actual contact with the conductive varistor face of course the varistors and holders are nearer the viewer than spade terminals 14 shown extending to the right from locations behind them contactors one each for the opposite face of each varistor are carried by the cover member as shown in the next pair of views fig7 shows in front elevation cover plate 40 whose rear elevation was shown in fig4 bore 49 near the top center just below the inner edge of flange 43 is surrounded by boss 48 slots 44 for spade terminals 14 not present in this view are visible as before the most prominent feature here is electrically conductive cruciform member 50 which has a wide body portion extending from just below boss 48 to near the bottom inside edge of flange 43 and narrower arm portions extending therefrom central rectangular part 55 of the body portion adjoins upper and lower body parts 56 and 57 each of which rises toward the viewer and is sufficiently springy to provide excellent electrical contact with the underlying varistors when the cover plate is assembled to the adapter housing base pair of integrally formed arms extend outward and slant downward from the opposite sides of the.