VeriFone VX 520 Operating Instructions Manual page 11

Paper roll replacing
To replace the paper roll, push a black key so it's shown on the picture.
Remove the empty paper sleeve from the priner.
Open the new paper roll and put it inside the way it's shown on picture below. Paper must run from
below. Pull a little bit paper out of terminal.
Close the paper roll cover slightly pressing until it clicks. Tear off any excess paper.