i AM IN THE PROCESS OF TRYING TO HOOK UP A JABSCO MACERATOR TO MY 71 AIRTREAM AND i CAN'T FIGURE OUT WHAT WOULD BE THE BEST WAY TO WIRE IT UP. cAN i WIRE IT TO THE LIGHT THAT IS cONVENIENTLY LOCATED IN THE REAR OF THE TRAILOR. wHAT ARE MY OTHER OPTIONS?