The post to connect the modern condenser pigtail to is the switch side of the coil. If original type wiring harness with color coded wire is used it will be the red wire. A lot of the non original type coil brackets will have a small hole in the center, right over the coil itself for mounting a condenser. It is very easy to mount the condenserin this way, it is much easier than replacing an original. The modern condensers don't seem to last very long if mounted under the dist. cap, where they can get no cooling air.
A lot has been said about the wireless lower plate for the so called modern points. It was obvious to me that this plate would cause shorting problems against the dist. housing. The wireless lower plate that is designed for use with original points is a much better idea, this setup uses an acorn nut that contacts the points to a special lower plate. There is nothing to fail about this setup and I have used it for years.
The distributor heat shield that was popular a few years ago is in my opinion a bad idea. The reason is, if you need to remove the distributor, for whatever reason, you will have to loosen two head nuts and remove the plate to access the set screw that holds the dist. to the head. Loosening head nuts will run the risk of coolant entering the crankcase.