Sidebar hide/show

I'll present the whole problem with pictures too. It's not a big one, but unfortunately I don't know how to work javascript one bit.

We have this adorable little sidebar full of widgets and pictures and we can't stop it distrubing mobile users who have to zoom in on the classic version of the forum without changing it's position to absolute. We want it to follow the user's scrolling though, so instead, we decided to make a hide and show option.

This is the tutorial we used: https://help.forumotion.com/tags/forum-widget

So now we have a tiny little arrow just bellow our header and we would really appreciate if it could be moved from over there to the position marked with THIS on the lower picture But we don't know how to do that.



Help, help, pretty please