You’re right. I didn’t notice that.
I ended up removing the speedo cable completely because the T56 has VSS.
I plan to order some VTX gauges soon. I called and they will read the VSS from the trans directly so no need to covert trans to cable drive just to convert it back for the gauges.
I'm running speed off of a Dakota Digital GPS module, the GPS-50-2 so no need for any input/output from then trans.