You can find the specs for the 6011 cables here: https://www.tek.com/en/manual/model-6011-triaxial-cable
Model 6011 Triaxial Cable | Tektronix
The Model 6011 is a 1.5 m triaxial cable that is terminated with a 2-slot triaxial connector on one end and alligator clips on the other end. This document provides an internal connection drawing.
I am missing two volts/ div knobs off an older T912 oscilloscope. Are there any knobs available that would be compatible with this scope?. I am not sure if you sell as an assembly but I appear to be missing the gray collar knob, the red "VAR" end knob, and the stem that goes back into the T912. Thanks