I tried posting this about an hour ago…
The lug on the cable is attached to the top screw on the voltage regulator. No special regulator for a 70. It is the same as other years, Then down to the engine block. As was stated earlier this made it so a ground strap was not needed. This arrangement was used for a m=number of years after the 1979 model year and is the same on my 71. This is the picture from above but marked up showing the location of the ground lug and the bolt location.
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