I Just bought a 85 pace arrow and am getting it ready for summer. This will probably be my first post of quite a few

. The motorhome has a Onan 5.0RV genset, part number 5.0bga-3cr/16004c. I need to change the oil and I can't find a drain plug or a place to fill it. I can't find any info on it online either.
Is anyone familiar with this genset? The oil filter is on the very bottom left. Do you maybe empty it where the filter is?
Thanks in advance to anyone that might have experience with this

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