ATB-MPK-0007
Universal Adjustable Mounting Bracket for Mounting Prime Design Camper Top Truck Racks
Mounting Hardware for ATB-PCR-6000-W and ATB-PRR-6000-W.
Manual Overview: http://www.truckbox.com/images/PDFO/MPK-0007 OVR.pdf
Manual Assembly: http://www.truckbox.com/images/PDFO/MPK-0007 MAN.pdf