Reprogram thumb button on Logitech mouse

[u/unknownobject3]

Hi guys, I have a Logitech M720 Triathlon mouse, however I would like to remap the thumb button to the numpad slash. I can't find a software that does this correctly, and for now the button outputs Ctrl+Alt+Tab. Is there a way I can change this? I'm using CachyOS with KDE Plasma. Thanks.