As I remember correctly, the webplayer has a 52 pin pad which is the floppy connecter of which only 26 are required, the other 26 are ground or no connection. A few folks actually had the header intact on some Webplayers while most required soldering a header on or cable, the header location is towards the top left corner as you are loking at the webplayer from the back.
The only missing componant is a fuse which can be bypassed to enable it, other than that it's ready to go.
FYI - I am not sure about a 50 pin interface, but most laptop floppy drives have a 26 pin connecters which the webplayer has (actually two rows of 26 but only one side is active, the other I believe is ground). The fuse location is on the back of the board labeled F2 I believe.
see the old post me and kRay posted some time ago... http://www.linux-hacker.net/cgi-bin/UltraBoard/UltraBoard.pl?Action=ShowPost&Board=vwgeneral&Post=351
Anybody seen or heard anything from kRay? I know as a fact he is "the man" regarding the Webplayer, I really would like to see hi site back up! His Journel site had the pinouts for all the ports on the Webplayer including where he connected a standard PCI slot adapter to the mini-pci (and got it working!). You might try emailing him at firstname.lastname@example.org which is the last email address I had for him.