|Below is a link to a reseller site that shows that drive.|
Can you post a link to a picture of the 50 pins. Your laptop came with an EIDE hard drive which should have 44 pins plus 4 more for jumper selection (probably no jumper supplied).
The connector has the same pin out as a standard EIDE hard drive with the exception the power is part of the connector and the the configuration is smaller. There is no other form factor.