(A.) Remove the MTX Platform Hardware
Start by loosening and removing the nuts that secure the square tube to the receiver tube on the MTX platform. Remove the bolts completely and be sure to also remove the washers. Set all hardware aside—you’ll reuse it in the next steps.
(B.) Position the Add-On Receiver
Place the Add-On Receiver between the square tube and the receiver tube, aligning the holes. The Add-On Receiver replaces the washers that were previously installed at this connection point.
(C) Reinstall Bolts and Nuts
Thread the original bolts back through the aligned holes with the Add-On Receiver in place. Reinstall the nuts and tighten evenly.