4,1 optical tray remove how? wrench size. Did search

[adam9c1]

I did search however unable to find...

What is the socket size to remove the optical bay cover?
I thought it was 2.5mm

I'd like to install SSD there

 

[OS6-OSX]

http://www.ifixit.com/Device/Mac_Pro

 

[adam9c1]

Nevermind,
I downloaded the manual.
I put the tower on the side, and then was able to pull the cage towards the top.