Looking at my character which ring slot do I need to use for Viridi's

Circular polarization radiation of the proposed antenna is obtained by introducing protruded slots and strips in the annular ring-slot structure Two

It seems very counter intuitive that we only have one ring slot by default It would make sense, instead of wasting a major upgrade,

ring of odin slot Slot Ring Cold-connected Sterling Silver Band Ring Size 6

ring slot If the person wearing one of these rings dies or removes it, the other ring instantly cracks; the wearer of the broken ring knows if it cracked