i'm trying to create an airtight soldered mount for a pipe on a pcb depth sensor board I'm designing. To do this I am trying to create a custom pad in Altium that is a ring and is also plated. I've tried converting the ring to polygons, regions and cutouts. I've not been able to get any of them to become plated.
The picture might make this easier to understand. I want to put a plated ring of some sort in the empty ring as seen above.