Elite SL-3000-UL SERIES Instruction Manual page 9

Weld front bracket with gate in open position.
Cut the cover 17 1/2 inches high.
REAR INSTALLATION COVER MODIFICATION
Important: For safe operation of the gate opener do not cut the slots any wider or longer than shown.
DO NOT modify the housing in any way other than specified.
FRONT INSTALLATION
Weld rear bracket with gate in closed position.
REAR INSTALLATION
Make sure the idler wheel has a safety cover.
Cut the chain access slot on the one side
of the cover to the exact specifications.
17.5"
2"