I have a question. Wich cable do I Need to Connect old ClubSport Pedals V1 to a new Wheelbase DD (8Nm)?
If you have an RJ12 on the pedals it will connect directly, if not an adapter will be necessary according to the compatibility portion of the wheelbase.
I own (and currently use) a set of CSPv1's with my CSL DD. The pedals natively have a PS/2 connection. So you need a PS/2 to RJ12 adapter, similar to this:
It shows sold out. When I bought my CSL DD two years ago, I contacted Fanatec customer service and they were willing to sell me one anyway. With the current shambles that the CS department is in these days, you can try contacting them but don't expect a speedy response, if you get one at all. You're better off having a look on Amazon or a local electronics shop. Good luck.