getting laptop opened

Got a NEC VERSA 6050MX given to me. The hard drive is gone, I have one to replace it but I can’t get it opened. I’ve taken all the screws out but their still seems to be something im not seeing. right around the middle in on both sides.

Any help would be appreciated

TIA

http://support.necsam.com/mobilesolu...ade/hddremove/ <--- this help?

I did find this Http://support.necsam.com/download/versa6050sr.pdf
hope this helps you