Jeep 2015 Cherokee - Owner Manual - Manual (Page 30)

3. Remove the battery by turning the back cover over
(battery facing downward) and tapping it lightly on a
solid surface such as a table or similar, and then
replace the battery. When replacing the battery, match
the + sign on the battery to the + sign on the inside of
Separating Ignition Node Module (IGNM) Transmitter
Case
Separating Keyless Ignition Node (KIN) Transmitter
Case
28 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE