Quality gold
(sarcastic)
I've read on the forums about those connectors melting when pulling a load, like going up a hill. Factors include the quality of the wire, the quality of the connection termination, then the quality of the terminal (blade).........
You think you got quality at the price point you purchased your item at?
Molex is good for a standard connector and its widely available anywhere. But I do not believe they have high amperage units, not until you reach Anderson PowerPoles that go up to weld gauge wires or shall we say cables?
I prefer XT90 from Hobbyking because I have fat fingers. XT60's just that much smaller. Conical 4mm type cone connectors, term is sensored I bet, also 5.5mm and around 8mm <<<biggest I've seen, maybe 120A but keep a reasonable window, say 100A max.
There is the 3-way xt60 style that is cool, remember the difference between solder connector and manual friction connector needs the tool to, sometimes expensive tool, but there are counterfeit tools for us hobbyists on the cheap. The closure of the connection is important, heat shrink is good, triple it up. I could never deal with small connectors, I bought a bag from grin in van, I used a few but they are hard to handle.
Amass is the XT90 brand I use as I just had a quick look at what I had on my desk. I like the recessed plastic stating - or +, I like the fact you can get yellow or black, I like the fact you can buy pairs or packages of singles. I always have way to many of the connection covers, I always have mixxed set and end up with needing the just the one. Then I end up ordering more, always. Thanks Hobbyking.
Skip the Automotive grade connectors.