RCF HDL 12-AS Owner's Manual page 20

2.3 SECURING THE FLYBAR TO THE FIRST HDL12-AS SPEAKER
F
1. Insert the frontal quick lock pins "F"
2. Rotate the rear bracket and secure it to the flybar with the rear quick lock pin "S" on the HDL12 Link Point hole.
2.4 SECURING THE SECOND HDL12-AS SPEAKER TO THE FIRST (AND CONSECUTIVE):
F
1. Pull out the frontal bracket "A"
2. Secure the frontal quick lock pins "F"
3. Rotate the rear bracket and secure it to the first speaker using the rear quick lock pin "P".
S
S
F
F
F
P