Sony BETACAM SX DNW-A30 Maintenance Manual page 17

(15)Be sure that the distance between the intermediate rails
on both sides (left and right) satisfy the specifications.
Intermediate rails
(16)Tighten the hexagon socket head cap screws (four
positions, total eight) attaching the outer rails to the
rack temporarily using the L-shaped hexagon wrench.
DNW-A30/A30P
DNW-30/30P
A
A'
1-6. Rack Mounting
1-7