Installed this trigger shifter on my wife's rad Runner 3+. It's so much better than the thumb shifter that comes with it. Very inexpensive and you can reuse your cable if you're careful - You'll probably need to cut the end off because it'll be a little Bit crimped. I ended up shortening the table housing slightly and reused the original cable even though it was about an inch shorter shifting works great and you can keep your hand wrapped around the handle while you're shifting.
https://a.co/d/1TttAI4
Can you post a picture?
I meant your install.
The picture of the shifter installed on your bike.