Hm, as I said, I never tried to do what you did. It indeed did not come to my mind that you did this using YaST alone. And when somebody here says that he made a symbolic link, then he mostly means just that: typing
A big misunderstanding. But it is, at least partly, created by the fact that you did not descibe exactly what you did. You apparently presuming that all other people immideatly would guess that correctly. This is most often not the case.
ln -s <some-existing-file> <some-link-to-it>
Now describing exactty what one does and posting it is definitely more difficult for something done in a GUI (often requiring screen prints posted in a a paste=bin) then in the CLI. One of the reasons why we prefer the CLI in such cases.
I tried to find out a bit about what your action could have been in start YaST > Network Services > NTP configuration. I guess you clicked then the Add button and choose something like Raioclock or so. Please explain what you did exactly there. And keep in mind that maybe none of the people here has ever done this (in the mean time hoping that someone tunes in here who has experience). Most are satisfied with seting up a connection to a server on their Lan or the Internet. Only a few will use their openSUSE as NTP server for their LAN. And that is about what is normal here.