Pro-Form PERFORMANCE 300i Owner's Manual page 12

9. Attach the Latch Assembly (42) to the Left
Upright (73) with two #10 x 3/4" Screws (7); start
both Screws, and then tighten them.
10. Slide the Right Inner Upright Cap (102) between
the Right Upright (95) and the Motor Hood (56).
Then, press the Right Outer Upright Cap (103)
against the Right Inner Upright Cap until they
snap together.
Repeat this step on the left side of the
treadmill.
9
73
42
7
10
12
95
102
56
103