2008 Jamboree/ Tioga 31m 12v dc power.

New owner of a 08 jamboree and have found that the antenna nor the entertainment box have power to them, also there is no power back to back antenna.  I've looked throug the manuals which were of no help. Does anyone know if theres a online fuse or is there a connection behind the outside radio panel? Just hoping not to have to chase wires all over the rig.  Thanks