I have a 2007 Tundra with a 150 amp alternator. The camper is a 1994 Scamper PUP. I want to wire the truck to charge the camper battery (there is no battery currently installed on the camper). What is the best place to locate the battery in the camper? What gauge cable should I use? What is an appropriate isolation solenoid to use for this configuration? Appreciate any responses!