Incinerator Room:1930, 3313
In the High Security lockdown area, head to (2033,3355) and jump up the boxes to a ramp that leads to a walkway. Follow the walkway to a terminal that grants access to the incinerator room. Once inside, quickly make your way to the terminal and select the option that reads “326:3839″. A door will open to the datacron and a new terminal that gives you an item you’ll need for the Yellow Matrix Shard datacron coming up.

ended up having to use 326:3827 on Republic side to open the door