For a visual of what the Button and Rubber Band Line Keepers Look like on a rod, here is a link:
https://www.amazon.com/tenkara-line-holder/s?k=tenkara+line+holder
You will need to scroll down to find the photo, of the Button and Rubber Band Keepers, Each time I checked the position, it jumped to a new position, so I can not provide an exact position, But they do look like Buttons, so they should be easy enough to locate. And, of course, the Right Hand Keeper would be moved to the right as far as is possible to wind the line on the rod as quickly as possible with the fewest wraps.
Clicking on the description, will allow you to access a magnified image that better shows how the buttons mount and look on a rod. I prefer to use a smaller button on the top and a bigger one on the bottom. Winding the line on the keepers in a Fig-of-8 pattern prevents line twist better than wrapping it on in a circular motion…Karl.