general heating system installation question, haynes manual isn't helping much... Options

[pba110]

hey,
some quick questions because my heating system has been completely removed:

1. where is the warm air blower supposed to be located? engine bay above the carb/fuel injector?

2.if so, where does it mount and where would i locate the wires which supply it with electrical power and control? i found the hole in the floor of the engine bay for the ducting on the drivers side, but where is the hole for the passenger's side ducting?

3. the warm air from the HE's flows into the cabin under the engine bay correct? it's routed to the blowers in the front of the car?

4. the blowers in the front of the car are mounted behind the gas tank? to access them/work on them you have to remove the fuel tank?

5. if sliding the top vent/blower control (in the cabin) back and forth results in no air movement i've either blown a fuse or the blowers are done...which is more likely? all the fuses under the dash seem to be intact. PO said the blowers were working.

pretty confused withe some basic stuff here so
your expertise on the matter is greatly appreciated!
thanks!