When installed vertically, the wires can be neatly secured within the box. Sideways installation may. Did you know that installing electrical outlets sideways can save valuable space in cramped areas? It's a simple tweak that can make a world of difference in tight spots like behind furniture or in narrow kitchen spaces. Back wiring using the Leviton Quickwire™ push-in feature, colloquially referred to as “backstab”. But if you take a close look around your house, you'll probably find at least a couple mounted horizontally, with the receptacles side by side. This orientation is often found in kitchens or near.