Where is the oil filter cartridge on a Daelim s1 Thanks

CHANGING ENGINE OIL When the engine oil is contaminated, the life
of engine will be remarkably shortened.
Keep the proper oil level, kind and replacing
period.
Place the vehicle on a flat surface, and idle
(warm up) the engine 2~3 minutes.
Stop the engine, separate the oil level
gauge, place a vessel under the engine,
and remove the oil drain bolt to drain the
oil.
Remove the adjusting hole cap, and clean
the oil filter screen.
Check the condition of O-ring of oil filter
screen.
Install the oil filter screen, spring,
adjusting hole cap.
Install the oil drain bolt.
Check the oil level gauge, and add the
engine oil until it reaches the specified
level (between max and min)
Install the oil level gauge, and idle the
engine for a while.
Wait for 20~30 seconds after stopping the
engine, check again the oil level gauge

Guessing you may only have an 'oil filter screen".. Located behind hole cap at bottom of motor ref:
https://www.manualslib.com/manual/405363/Daelim-S1-Catalog.html?page=40&term=oil+filter&selected=1