Swintec SW20 Portable Cash Register Paper feeding

Question

Hi.
I have lost my manual and cannot figure out why the paper is not feeding as it calculates.
Also It has been a while since I used the register and cannot remember how to even thread the paper through.
There is a black removable spool that sits in a cradle in the paper tray, just cannot remember how it all threads through.
Thanks for your help.
Regards.
Dunderhead!