The cable is mounted with two short J-straps on the block, not on the motor mount, there are NO J-straps near the solenoid which is mount on the fender apron near the back of the battery above the voltage regulator.
I only put the longer repop J-strap in my picture to show the difference between the factory short and the repop long.
The original cable as shown in my pictures runs from the starter terminal down to the short J-strap mounted on the block, the mesh loom sticks out about 1" before the J-strap towards the starter.
The cable then runs through the mesh loom directly along the oil pan/windage tray/block seam to and through the second J-strap, then along with about the last 4" of mesh loom the cable routes up towards the solenoid between the frame and exhaust heat shield along with the alternator wires and ground cable. The cable is not marked marked but has an engineering number tag placed on it about 11" down from the solenoid.
Look earlier in this topic I posted two pictures of the starter cable routing, one in front of the motor mount and one from behind showing the routing right to the starter.
The factory 428 CJ block comes with the two 1/2" threaded holes in it and the windage tray should be notched out where the J-straps bolt to the block, ford also used the same 1/2" plain bolt to mount the J-straps as was used to fasten the ground cable to the front of the block.
I have now also posted an other picture which shows the starter cable routing looking for underneath towards the heat shield and solenoid above it, which is not visible obviously.
I have decided to also post a picture of the restored short J-straps mounted back on my engine as I am in the process of final assembly getting it ready for my cam breakin run.
I trust this help you understand the 1970 Dearborn built 428 CJ cable routing as it came on my car and as Ed has indicated was typical for them although has never been documented.