want to make a cut in the via like this image.

I'm using Altium to develop.

I was recommended to make the via "castellated" but I can't find how to make this via in the center of the board. Does someone know more about "castellated" 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 cut, to result in six signals for read. it doesn't exactly have to be done by "castellated", but the only way I found was this, I would like new tips

 

want to make a cut in the via like this image.

I'm using Altium to develop.

I was recommended to make the via "castellated" but I can't find how to make this via in the center of the board. Does someone know more about "castellated" 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 cut, to result in six signals for read. it doesn't exactly have to be done by "castellated", but the only way I found was this, I would like new tips
View attachment 237703View attachment 237705

Your making a 6 axis sensor , they are a few dollars off the shelf.