Steve, they are so light, I just wire tied it up under the left drivers side. I have a male 120 Volt plug in the inverter, then wired over to the 2x4 box on the floor. Yes, I ran a heavy set of wires from the battery to it. I go through a set of normally open contacts so it DE-energizes when the motor isn't running.
Ozz
'07 3400RL 2nd RTU
2 Golf Cart batteries 3,000 watt inverter, automatic transfer switch
Honda 2000 Generator, Maytag's with 220 Dryer
Stationary domed Sat. dish, LCD 12 Volt Amp gauge, LCD Tank Monitor
3 added 120 volt outlets, On Board Air; 12 Volt Viair 450C compressor
2006 Ford PSD 4x4 Off Road Lariat, Hadley Air Horns, Truck inverter with 110 volts: laptop, Color Backup Camera, Awning lock