Yes, battery cable to starter side of solenoid at the solenoid.
Your comment: "It may not be necessary at all if you have power to the coil with the key on."
Excellent point - and I do have power to the coil.
You wrote: You can isolate that with voltage readings (key on) or with resistance readings (power off) by unhooking/disconnecting the components in the distributor until you find the problem.
Correct - and that's what I'll be working further on when I get time to get back to it. After having identified and solved the problem of short with side feed thru distr, I'll be working with points and condenser. Have I really burned up 3 sets due to short at distr side feed??? Going for 4 I suppose.