HP Model 743 PC Owner's Manual page 59

Accessories Installation
PMC Bridge Adapter and Expansion Adapter
12 If you have installed a PMC expansion adapter, resulting in a three board
assembly, we recommend that you install the ejector handle sleeves in-
cluded in your kit.
a Remove the logo and model labels from the ejector handles on your board
computer, as shown in Figure 2-12.
Model label
Logo label
Figure 2-12 Removing Ejector Handle Labels
2-21