The speedometer cable somehow snakes in between the clutch and brake mechanism:
And then passes through the cross member:
On the other side of the chassis cross member it snakes up and then into the speedometer cable attachment on the transfer case:
Taking a close look for the first time I wondered about how loosely fitted this is. And I wonder how it manages not to get snagged by the clutch and brake mechanism? So not sure this is the orginal cable routing, though it is the shortest route from speedometer to transfer case.
I hope this is of some help.