Hi Zak,
Try this link out in the PP Tech Info Center.
Pelican Technical Article: Replacing and Adjusting the 911 Clutch - Page 1
There are pics of the 915 and 901 clutch / T/O bearing - the 901 does not have the T/O bearing in the spring plate diaphram - see pic 45 & 46 on second page. I have a 915 so just passing this along - but I did used this link for my 915 clutch replacement.