Low resistance 4 mm patch cords

[Wallace Gasiewicz]

These are Pomona 5000 Volt 36 in banana patch cords,do you think they would be low enough resistance?

https://fairradio.com/product/rj-5031-3y/

[Neomys Sapiens]

With such a high voltage rating, most of the diameter is going to be insulation. So the actual copper will be rather less then with standard test leads.

[HighVoltage]

If you look for high voltage or high current test leads connectors in good quality, take a look at the Swiss company:

Stäubli / MC / Multicontact
https://www.staubli.com/en/connectors/electrical-connectors/

In my experience they are one of the best.

[mariush]

Maybe there is room to use the standard molex mini-fit connectors used by video cards?
Being mass produced headers, you can buy them cheap, and you can also buy the connectors cheap, same for crimping tools.   

For example use a pci-e 6 or 8 pin connector, either right angle or straight up ... you have 3 awg18/awg16 pairs of wires for low voltage drop and contact resistance, and you can get mass produced 6/8 pin pci-e extensions cables or make your own.

example: https://www.digikey.com/en/products/detail/molex/0455580003/3311349

Could have two side by side and thick traces connecting each row  for "pass through"  ... first is input, second is output ... or the other way around ...