Display module fastening assemblies are provided which facilitate installment of multi-display devices in small or limited spaces and without needing access to a rear side of the devices. A display module fastening assembly includes a back cover. A fastener receptacle includes a groove formed in a sidewall of the back cover. A fastener is detachably securable to the fastener receptacle. A support protrusions may extend outwardly from a contact portion of the fastener, and the support protrusion is configured to fit into the groove of the fastener receptacle when the contact portion is inserted into the back cover.