Hi
Yes, you have two of the correct links there.
If we take the will of Samuel Bush as an example, on NROCAT it says
Busshe (Bush), Samuel, clerk, of Ringland 1626 NCC will register Mittings 136
So select the film for 1626 by clicking on the camera icon. 136 is going to be the the folio that the will should be found on. Usually is written top right corner. So they are quite easy to find.
If there are two or more register books on the film there may be of course be more than one folio 136.
I think most of the Archdeaconry of Norfolk wills are locked up though.
John