Use the part set suite Part button in top level engineers.
With the Premier there's several ways to do the same thing, that's why to a newbie the manual is all over the place.
Are you 100% sure you have not already learnt a device to that spot? I have been caught like this before.
Worth trying to delete the input you are trying to learn and try again.
Some of us have other things to do on the weekend...
Read ALL the manuals cover to cover a few times.
You will not be learning Texecom radio stuff using the DIP switches any more, as that's for legacy.
Default everything start a fresh, to learn radio OTB press Omit button while in highest level engineers menu, follow the manual for V3 firmware.