How to connect a high current sensor to power line
First of all elongate the PCB so the low voltage parts are away from the high-voltage side. Double-sided PCB with 2/2 oz copper pour, 90 mils thk, with thick tin/lead solder plating out each side of the 3 fat pins to a 1/4"/7mm hole.

You can use a crimp on ring terminal but with 4 awg THHN you may want to bolt in a set-screw lug for 4 awg wire. Use a 1/4-20 SS bolt or a metric equivalent.

4 awg is so stif it is better to let this assembly 'float' where the wire wants it to, and have a small gauge (22-26awg) multi-wire cable come from this enclosed assembly to its destination. The device outputs 50 mA with a 100 amp RMS input, hence the 1:2000 scale.

Slot cut the PCB .031" by 1.0" between the high voltage and low voltage sides to prevent creapage due to moisture and/or dust.

Use a 200 ohm 1% or .1 % load resistor to scale it as a voltage so that 100 amps AC equals 10 VAC output (+/-16 VDC), or 20 ohms to equal 1 VAC output, or +/- 1.6 VDC if DC input.