Gree LE60-13/C1 Owner's Manual page 11

(4) Install the button battery at the buttery holder. Please note that the positive
and negative poles should be connected correctly;
(5) Buckle RF remote controller and the base together;
(6) Tear off one side of 3M tape and then stick it at the back of RF remote
controller correctly; tear off the other side of 3M tape and then stick the
mounting plate on the wall, and then the installation is finished.
RF Remote Controller LE60-13/C1
5