As shown in the figure above, use B1 ST4.2*12 cross-flowered semi-circular head
self-tapping) to fix the plastic parts at the armrest of the boom to the main frame.
Section Three
Fix the front and rear plastic parts on the main frame with C1 (M5*10 semi-circular
head cross-stitch screws) and C2 (ST4.2*12 cross-flowered semi-circular head
self-tapping screws).
