click link below for diagram.
#26 is the lever on the transmission that lets the mower move. Appears to be on the bottom of the hydro trans. Might have bent it.
#40 is the cable that pulls that lever.
Make sure the E brake is off when trying to roll it. You might need to hold the trans release knob while rolling it. It might not hold itself.
They are two different hydro transmissions. From the diagram, I can only see one release lever but each trans might have a release lever on it.