Imit Duo Plus Instruction Manual page 12

D) Connect the wires to the terminals as per wiring diagram
(see next paragraph "wiring connections"), snap the unit
back to its base and tighten it with the provided screw.
12
E) Insert n°2 1.5V alkaline batteries, type LR6 into
the battery compartment, making sure that the proper
N.B. Insert the first battery into the left side of the battery
compartment and the second one into the right side of the
compartment. Finally press on the second battery so it fits
polarities are maintained.
properly.