The only place I can think of that uses this nomenclature is the check engine coding having to do with oxygen sensors. This is irrelevant since there are not separate exhausts, assuming this is a 4 cylinder engine. You only got one bank.
Right Hand Side (passenger side)...
It is located on the engine block drivers side.
It's on the right front side of the engine and accessible from under the car.
in the engine bay. Passenger side. Near the strut tower.
In a 2004 Subaru Outback, the thermostat is located on the bottom of the engine on the driver's side. Remove the screws holding the fitting that the hose (from the bottom of the radiator leading to the engine block) is attached to, remove the fitting, and the thermostat will be underneath.
left side engine compartment . follow battery cables to the starter
Engine serial number is on the rear of the engine top left side. Illustration appears to be on the flange that bolts to the transmission.
The flasher on the Subaru Outback is located on the left side of the steering column and under the column itself. It is a square of about one inch on each side.
You can find the knock sensor on the top side of the engine under the intake manifold. It is easiest to find from the driver's side and is at the back of the engine block.
Subaru was kind enough to place the starter on the top side of the engine. Relatively easy but there are a lot of wires and hoses to work around.
Subaru 2000 Outback: Tranny side - 10 bolts, Engine side - 8 (including starter bolts). Tranny M/N TZ1A4ZCABA-WL. You're welcome!
*Hopefully* the same as other Subaru engines, low down the left hand side about half way up the engine (facing the engine) there should be a short yellow loop. Check it when the engine is cold!