A cable configuration tool includes an attachment base, a first cable retainer, a second cable retainer, and a cable guide. The attachment base includes an attachment point for mounting to an edge of an enclosure and an arm for mounting the first cable retainer, the second cable retainer, and the cable guide. A first aperture of the first cable retainer, a second aperture of the second cable retainer, and a third aperture of the cable guide are each configured to accept the arm of the attachment base, where the first cable retainer, the second cable retainer, and the cable guide are slidable along the arm. One or more cables for creation of a cable harness are placeable along an outer edge of the cable guide, where the cable guide defines a bend radius for the one or more cables of the cable harness.