Keys Fitness KF-HC Owner's Manual page 6

Assembly
NOTE: Hand tighten bolts and nylon nuts until machine is fully assembled.
STEP 1
Connect Right Front Support (8) to Base Frame (3) using
Bolts (15) and Washers (16). Make sure that the printed
numbers on the Front Supports (8) are facing inward for
proper viewing.
Left and Right Safety Bars (6,7) should be set at desirable
height in order to catch straight bar at lowest position if
needed.
6