Where is the oil filter on a 1980 honda cb650 custom?

i got it as a project to rebuild it i need to know where every thing is.Where is the oil filter on a 1980 honda cb650 custom?
It's in one of 2 places. It will either be under the engine (normally to the front) or it will be concelead behind a metal plate on the side of the engine.Where is the oil filter on a 1980 honda cb650 custom?
Attached to the engine.
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