Bamanana24...this is a very clear pic on what your encoder should look like
https://www.startingtoquilt.com/2015...gaquilter.html
don't forget, your encoders need to be cleaned and oiled (I do mine twice a year), and the rubber rings..called "o rings" need to be replaced every few years, depending on how much wear they get, and how dry your room is. You don't need to buy anything special, just take one to any hardware store and they will have them, very, very cheap! Always replace both o rings at the same time.
Also, it's a "thing" with the Tin Lizzies that the encoders are light and don't always make good contact, years ago, there was a video going around where you took a tiny piece of double stick tape and taped a nickel on top of them. I did mine years ago, and it helped a lot. I just posted on my yahoo forum to try and fins that video for another lady..no luck yet, but if I find it, I'll post the link.