Thanks DDHarriman.
The thing is that the picture for "Always Lock" in the "Important Notes" section is different from (and inconsistent with) what it is in the "Installing and Setting Up" section.
But in the meantime I found a video about it on their site (
http://www.plustek.com/product/flash...ock.asp?pid=11) and it looks like they want everything pushed in. I guess they just messed up the labelling in the Important Notes part.