I have 30-ish Headway 38120 LiFePO4 cells with flat tabs/tops (not the screw style) and building a DIY battery holder for them so I can do some cell and packtesting (similar to the ones for 18650's:https://www.amazon.com/Battery-Case-Holder-4x3-7V-18650/dp/B01FSDKXRI). I was going to use D cell battery contacts (like these:https://www.amazon.com/gp/product/B00LQPWLJ6/), but I learned D cell batteries only have a max amperage of 4 to 5 amps - I'll be testing these38120's up to30 amps max(they're rated for 100 amps, though). Any idea what metal/material I can use as contacts for up to 30 amps and that can also be soldered to (for 10 gaugepositive & negative leads andBMS leads)??