Dyna Glide ModelsSuper Glide, Super Glide Sport, Super Glide Custom, Dyna Glide Convertible, Super Glide T-Sport, Dyna Glide Police, Dyna Switchback, Low Rider, Street Bob, Fat Bob and Wide Glide.
No 2 seperate openings. Both on the right side of the bike. Larger **** closest to the cylinders is oil dip stick and fill. Smaller one towards the rear of the bike about the same level as oil fill. It is the tranny fill and dip stick. It might even look like a large screw head with a straight slot or a allen head in in. Did you get a owners manual with the bike. It should have all locations for fill and drain in it.
Diagram Ynots posted shows locations clearly. Do you have the correct type of oil to refill it? I know it's a Roadglide, but some useful info in this youtube clip.