need help installing hard drive into a TC-1660-EB11

I just bought the PC but since it only has a 256GB SSD I need more storage.
I bought a WD 4TB Blue SATA which has a 3.5" form factor. I see in the specs on the site I bought the PC from that there is a 3.25" bay available. I can find no documentation for the PC to help with installing the drive. Also, I can only find internal drives with a 3.5" form factor, not a 3.25" one. Can this drive be used in this PC?
So any help would be greatly appreciated.
I should state that even though I'm a newbie here, I have 20 years experience looking after Sun servers - which have excellent documentation.

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Commodore_1995#

These photos can help you:

Image: https://us.v-cdn.net/6029997/uploads/editor/g5/yaldj57wrblv.png

Image: https://us.v-cdn.net/6029997/uploads/editor/nn/02whrwuls6d2.png

Image: https://us.v-cdn.net/6029997/uploads/editor/i4/68kq1jzr2ma9.png

Image: https://us.v-cdn.net/6029997/uploads/editor/x0/y2va4fq05y1j.png

Image: https://us.v-cdn.net/6029997/uploads/editor/dw/hpzmi3gsoi9p.png

DonJ

thanks for the information. Looks like what I need.
But I can't remove the front bezel. I push in the three hooks and the bezel moves out partially and then stops. I don't want to force it but I can't see what's stopping it.