Abstract: A power supply assembly for supplying power to a modular wall panel includes a base module having a set of first mating ports and a plurality of first electrical conductors. Each first electrical conductor is electrically connected to a respective first mating port. The power supply assembly also includes a reversible coupler having a plurality of second electrical conductors therein. Each second electrical conductor is electrically connected to a respective second mating port and to a respective third mating port of the reversible coupler. The reversible coupler is selectively attached to the base module in one of two different orientations. Each second mating port is electrically connected to a respective first mating port in a first of the two orientations. Each third mating port is electrically connected to a respective first mating port in a second of the two orientations. Each second electrical conductor is electrically connected to a same first mating port in each of the two orientations.