Htc Touch Cover

I just received my HTC Touch smartphone, but need to get the battery cover to insert ... Someone who has this phone have an idea of what I'm supposed to do? The diagram in the manual is vague and I can not under my nails (I bite them: P). I do not want to use brute force, in case I'm doing wrong and breaking the phone. How do I enter?

Please consult the manual that usually carries this information in the first two pages.

There is a youtube video to show you how:
http://www.youtube.com/watch?v=wFWyJu8Oz ...