HP d325 Slim Tower Model Hardware Reference Manual page 17

Hardware Upgrades
8. To remove the front bezel, gently pull up all three tabs 1 on the
top of the bezel, then pull the bezel 2 away from the chassis.
Removing the Front Bezel
To reassemble the computer, reverse the above procedure.
✎
To re-install the front bezel, insert the two bezel bottom tabs, then
rotate the front bezel forward to snap the three tabs on the top of the
bezel in place.
Hardware Reference Guide www.hp.com 2-7