Overdue - Sorry !
At last, the circuit you wanted...
This is exactly as I built mine, the resistor ratio may not make mathematical sense but it reads correctly for two different energisers of mine.
Note I show an earth connection - I use a 16" length of 6mm stainless tube to provide an independent earth for the meter -
Make sure you connect earth first !
I use two different digital multimeters, one is auto-ranging, both work OK.
Expect a reading of 1V for every 1kV from the energiser.
The capacitor takes a few fence pulses to charge up, maybe 5, you can see the meter reading peak higher each time. It will never be stable as the cap voltage will decay between pulses but you will get as clear an indication as any commercial meter will give.