it looks like the there's a little conversion plate within the r3000 front mech that has to be switched depending on the cable run. link to the installation guide here - https://si.shimano.com/en/pdfs/dm/RBFD001/DM-RBFD001-01-ENG.pdf
I think that is a different mech from mine - maybe I was wrong with the number. Mine just has the normal bolt with a washer and a groove for the cable in the arm.
@tertius started
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it looks like the there's a little conversion plate within the r3000 front mech that has to be switched depending on the cable run.
link to the installation guide here - https://si.shimano.com/en/pdfs/dm/RBFD001/DM-RBFD001-01-ENG.pdf