SPORTS ART DF-208 Owner's Manual page 11

STEP 1
Connector Installation (Cont.)
Before assembling, remove screws (51) from the main frame (A3) as
shown. Use connector A (A28) and connector B (A29) to connect the main
frame (A3) to the secondary frame (A30) and then use screws (11) (51)
loosely secure these pieces. Do not tighten screws yet.
Set the unit flat on the floor. First secure screws (51) on the main frame
(A3) and then secure screws (11) on the secondary frame (A30).
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