vz aftermarket headunit question

[CoJang]

I have a double din Sony touchscreen headunit and I want to take it out to add amps and such. I didn't install this myself and am a little stumped. I can take the plastic shroud off no worries and am left looking at the bare unit and can move it so it pivots up and down but I can't pull it out. Is there a screw hidden somewhere or something like that making it so I can't get it out?

[D3CID3R]

take to side trims off each dash/ footbay area and have a look