Rain Bird ESP-6LX+ Installation, Programming, And Operation Manual page 60

If you wish to bring the power supply wires through the
wall on which you mount the controller, use the ½"
(1,3 cm) knockout in the rear of the cabinet. Also remove
the circular cutout in the flame-retardant fiberboard liner
at the rear of the high-voltage compartment. .or safety
purposes, be sure to seal the unused entry at the bottom
of the cabinet.
If you wish to bring the supply wires through the bottom of
the cabinet, attach a ½" (1,3 cm) conduit fitting to the
bottom entrance of the high-voltage compartment. Then
attach conduit to the fitting.
ESP-LX+ & LXi+ Installation, Programming, & Operation Guide 57