thomann Stairville Stage TRI LED Bundle Extension User Manual page 19

Pre-mounted spots The four spots (1 ... 4, left to right) are pre-mounted on the T-bar.
A Locking screws to fix the height and inclination angle.
B Locking screw for fixing the spots on the T-bar and the horizontal orientation
(dispersion direction).
C Electrical connection of the spot at the T-bar (pre-mounted).
Stage TRI LED Bundle Extension
Installation
19