Texas Instruments 3000 WinSX - Manual (Page 114)

RAM Modules
3 Repeat steps 1 and 2 for the remaining three modules in the set, except
insert the second module into socket XU15, the third module into socket
XU16, and the fourth module into socket XU17.
4. Replace the keyboard as described in the next section.
Replacing the Keyboard
Replace the keyboard into the computer case as follows.
1. Rotate the keyboard right side up and insert the three tabs on the front
side of the keyboard panel into the three matching slots on the computer
case.
2. Hold the front of the keyboard in place while you lower the rear of the
keyboard onto the computer case.
6-6 TravelMate 3000 WinSX Options