A wall-recessed electrical-outlet box is employed as a wiring junction-box, especially for burglar-alarm systems, and is camouflagingly concealed by a cover plate the face of which simulates an electrical device commonly found in such a location. The rear face of the cover plate carries a plurality of labeled busbar-like elements. Wires which enter the box from within the wall can be pulled out somewhat and have their ends soldered to the busbar-like elements while the plate is temporarily held conveniently spaced from the box.