Cutting rings in case of emergency

I'm a pessimist. Anything that can go wrong, will go wrong. So I would like to have instructions at hand for emergency cases when the ring needs to be cut off.

I could easily find this information for Oura which instructs cutting "from the palm side of the finger at the ring's thinnest point".

I haven't been able to find this information for RingConn or Ultrahuman, though. What about Ring One? Would it be safe to assume that it's the same for all of them, as their design is similar enough? How can you tell from the outside (without checking the inside for sensor positions), if the ring is correctly positioned on the finger and the palm side is safe for cutting? For Oura it's easy with either the flat top or the indentation.

And what about Velia (Iris)? This is one upcoming ring that has a different design where sensors aren't positioned at the palm facing side, and you could twist it which ever way you want. I guess the LED they added to the design recently would help determine which way is "up"?