The release bearing is attached to the pressure plate fingers (see picture below) and you need to use duct tape to tape the release fork to the release bearing to hold it into place while assembling the trans to the engine..
There are "Help" articles on Pelican that might be of some help here also..
Pelican Technical Article: Replacing and Adjusting the 911 Clutch - Page 1 Pelican Technical Article: 911 Oil Scoop Installation