Keys Fitness 1550 Owner's Manual page 21

Assembly
Step 12
Connect Long Lat Bar (22) to the Chest Press Cable (76) using two Gear Hooks (37) and Short Chain (36).
Connect Ab Strap (32) to Mid Pulley Cable (77) using one Gear Hook (37).
Connect Short Lat Bar (23) to Mid Pulley Cable (77) using two Gear Hooks (37) and Long Chain (35).
Figure 12
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