SERVIS AUTOMATIC 800 - How do i remove the dispenser drawer to clean it?

I have a Servis Automatic 800 washing machine that has done the family proud for over nine years without any failure. Recently my partner has insisted on giving it some TLC and a good service before it decides it's had enough on life and finally breaks down.
One huge question...
HOW DO YOU REMOVE THE DISPENSING DRAWER???
It won't pull out straight or at an angle, something seems to be preventing it's release, and if the machines top cabinet lid is removed you have absolutely no visibile clues as to what to do...

These machines are very common, sureley someone knows... or has a manual or link to a ".pdf" manual online maybe???

!!!??? PLEASE HELP ???!!!