Maverick 88: HELP!

[Bigger is Better]

Good morning all guys. I've a big problem: I've just bought a stock shell holder for my Maverick 88, but to apply it on the stock, I've to disassembly it. This is the point: I don't know how disassembly a shotgun stock. Can you help me partners? I'm sure you can. Thanks

P.S. Would be welcome some pictures of the "operation", if you have.

 

[jojosdad]

Here's the manual: http://stevespages.com/pdf/mossberg_maverick.pdf
The information you need is on page 17.
Ciao.