Female thread? The three common type I've seen are male threaded, not seen a female threaded.
Common is a real fine thread that is just a dust cap, it actually has a 2 inch cam lock groove on it, very common in any farm supply store. Got mine at Runnings, female 2 inch cam lock, reducer fitting to 3/4 inch, and a 3/4 to garden hose adaptor.
Another is 2 inch pipe threads. Similar adapting, common ag spray stuff.
A third is a course thread, similar to 2 inch pipe but different thread count. You have to search a bit for that, not as common anyhow 'here'. I have one of these totes, have not happened upon the adaptor yet myself.