Step 1
Attach the legs
(1)
to the middle rail
(2)
. Fit a washer
(B)
to a bolt
(A)
and then insert the bolt into a hole.
Fix the bolt with the Allen key
(C)
but do not tighten
it yet. Repeat this for the remaining holes.
A x 4
B x 4
C x 1
1
1
2
A
B
C