Vente Unique BOAVISTA Bedienungsanleitung Seite 30

6. The left and right beams B1/B2 are respectively placed on the corner
connectors on the column, and the screws K1 are tightened;
C
K1
C
B1
B1
A
Step 1 Step 2
B1
B2
K1 QTY:8PCS