Top two resistors are bleeders. The bottom resistor powers the neon lamp (Russian manufactured, packaged in a 3AG fuse body).
Frequency Metering Board Resistor is covered with heat-shrink tubing and anchored securely. To the left in this photo, a Banana jack allows connection of a high voltage probe, for viewing the voltage waveform at the positive terminal of the capacitor. Top connection on the right goes to the SCRs. Middle connection goes to the applicator coil cable. Bottom connection goes to the frequency metering board.
Parts List: G-10 Garolite or FR-4 Fiberglass board, 1.8" Inch thick, as needed. J27: Banana Jack, uninsulated, 1 ea. R1-R4: 2.2 Megohm 3 Watt 15 KV Resistor, Tepro , 4 ea.