Jeep 2010 Grand Cherokee - Owner Manual - Manual (Page 71)

WARNING!
Always remove the subwoofer from the vehicle
whenever the tether anchors behind the subwoofer
are required for proper installation of a child re-
straining device. In the event of an accident, or under
severe vehicle maneuvers, leaving the subwoofer
unsecured in the vehicle could result in serious or
fatal injury to anyone in the vehicle.
Tether Strap Mounting
70 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE