real living ROCKBRIDGE GBO22-019-2 Assembly Instructions Manual page 4

Secure sofa back (B) to left arm (A1) with 2 washers
(D) and 2 screws (E) by using allen wrench (G).
Do not fully tighten now.
Secure right arm (A2) to assembled sofa back (B)
with 2 washers (D) and 2 screws (E) by using allen
wrench (G). Do not fully tighten now.
STEP 1
B
STEP 2
A1
B
A2
A1