Hi Andrew,
I actually introduced an error by stating that I was using an USB2EQ6 Interface Cable whilst in fact I was using a standard USB-Serial cable plus the EQDIR module. I copy pasted that info from the Shoestring website because it looked like what I have
Just in case that somebody stumbles over this post whilst searching about Stellarium telescope control:
Stellarium actually does not need the EQDIR module (in fact, it wont work with it!) rather, it connects via USB Port-USB to Serial Adpater-Serial to Handcontrol (SynScan) PC port and the hand controller being plugged into the mount. I googled a long time for some clear instruction and only learned about this solution in a related post.