TM 9-2320-209-10-1 c. Installing the Front and Side Racks. FRAME 1 1. Put side racks with seats (1) into sockets (2) on right and left sides of truck. 2. Put front rack (3) into front rack sockets (4). 3. Make sure that retainers (5) on front rack go into retainer rings (6) on side rack. GO TO FRAME 2 4-80