Not in a 37. There was (is?) a urinal in the engine compartment at the radiator end. As someone has already pointed out compressors at one end and exhausters at the other. Motor blowers in each.
Forgive me for asking as I've never been in a class 37 or similar locos but what is in the nose section as I've seen a door leading to from the cab into the nose. Also why do some class 37s have access doors at the front above the buffers?