There are two cables. One for North/South and the other for East/West. A lever on the side of the shifter is used for East/West. The Ball on the bottom is for North/South.
The B&M site has good step by step instructions for removal of the console and access to the shifter. Take her apart and lube her up.
http://www.bmracing.com/PRODUCTS/Porsche/Precision-Sport-Shifter