So my 2007 Marlin owners manual shows a Generator Fuel gauge installed in the cabin ...HOWEVER !! The only gauge is a mechanical gauge mounted on the Diesel tank... I would like to mount an electrical diesel fuel gauge in the cabin or somewhere visible. Wouldn't it be nice if the wiring was already in place !!! ??? I doubt that very much ... So can someone with a factory mounted gauge give me some information please... Where is the gauge actually located ? Is it always powered on ?? I saw a picture of a gauge mounted on the generator control panel on a 336 . My panel looks the same but without the gauge installed ...So any information would be appreciated and get me started in the right direction ..