I want to make a cut in the via like this image:

[![enter image description here](https://i.stack.imgur.com/CEMDl.png)](https://i.stack.imgur.com/CEMDl.png)

I'm using Altium to develop.

I was recommended to make the via "castellation" but I can't find how to make this via in the center of the board.

Does someone know more about "castellation" and can help me make this via with cut in the center of the board?

I'm making a six-axis sensor.

They have three vias with cuts, to result in six signals to read. It doesn't exactly have to be done by "castellation", but castellation was the only way I found.

[![enter image description here](https://i.stack.imgur.com/ygXc1.png)](https://i.stack.imgur.com/ygXc1.png)