The instructions with the paper towel holder say push the cover off the mounting arm then slide the bracket off the mounting arm. Problem with this is you can't just push the cover off the mounting arm because there is a little lip inside there that the cover slides over which makes it so it will not slide off. The way the pieces fit together it's impossible to just take the mounting assembly apart from the arm itself to mount it. The person who said just to slide it off, it isn't that easy.
Yes you can remove the end piece that covers mounting screws and slide apart.
This one the screw holes are 2 " apart
You just snap off the piece that covers the screw holes , slide out the holder , install screws , slide holder back in and snap cover back on , just make sure the holder is slid all the way in due to cover keeps it in place.