A wire harness assembly system is disclosed. The wire harness assembly system includes a grid tile designed to receive repositionable accessories to route wires along the grid tile. The grid tile includes a plurality of keyed holes extending from the top of the grid tile, through the grid tile, to the bottom of the grid tile. The grid tile also includes a locking surface on the bottom of the grid tile. The locking surface complements the plurality of keyed holes to receive the repositionable accessory and to maintain the repositionable accessory in a locked position.