4.Fix the desk legs (A2) and desk bases (A7) with bolts
(B7+B6)and screw them with the internal hexagon wrench.
Adjust the foot screws so that it can stay on the ground
stably.
5.Put the whole desk board set on the legs. Aiming at the
installation holes, rotate the board, use screws pads (B7) to
fix them, tighten the bolts with the internal hexagon wrench.