Sorry it took me so long to update this - couldn't actually get out there to work on thing until yesterday.
This is a link to an IMGUR album with some photos.
Heater and Lock Box - Album on Imgur
The lock box was easy enough to take care of once I figured out what it was.
Ive gotten all the hose housing off for the heater. There are 3 points where the hoses go under the bus - the very back - the middle (down to the heater?) - the front.
There is what looks to be a 1 shut off valve at the back of the bus in the engine compartment...
I assume there is coolant in these hoses? I just don't know I'm at such a loss on this one.