Check this link to the Service Instructions for several of their older cranks. Note what it says about ring orientation on the top right column.

https://si.shimano.com/en/pdfs/si/1H...0A-001-ENG.pdf

Though also check and be certain this SI is for your crank. And also be certain that you got a ring that Shimano says is compatible with that model of crank.

If the Tech doc site is difficult for you to wade through, then let us know the part numbers of the crank and the ring that you are having trouble with and I or another can check if it is considered compatible by Shimano.