Please explain how to calculate the peak current value when observing the waveform of an electrostatic discharge simulator. (When using two 20dB attenuators)

Please explain how to calculate the peak current value when observing the waveform of an electrostatic discharge simulator. (When using two 20dB attenuators)

Let X be the value observed on the oscilloscope (unit: V).
X × 10 (20dB) × 10 (20dB) ÷ 2 (2Ω resistance of the target) = peak current value (unit: A).
Example: If the oscilloscope displays 0.15V when 2kV is applied
(The standard specifies 7.5A ±15% at 2kV.) 0.15V × 10 × 10 ÷ 2 = 7.5A