RV Repair: battery drain & arctic pak, thermo coupler, lp gas detector

Question
Hello,  We just purchased a 1999 Cardinal 5th wheel, and it doesn't have the original paperwork and books.  There is something draining the battery, but we cannot find it.  And can you tell me where the converter box is located on these units?  Would the arctic pak be drawing juice, or the lp gas detector?   And is there a way to adjust the temperature of the refrigerator if it says it is 'preset at the factory'?   Thank you.

Answer
1.it should be close to you batteries or in a compartment next to them
2.yes but very little
3.yes you can go out the back side and move the thermo coupler over a fin it should be on the 4th or 5th fin
you can go through your fuse box and use a volt meter to watch and pull a fuse and see which one is drawing the volts