67 barracuda EZ Wiring Questions

Correct or not. I have used #56 terminals both male female, and #58 terminals like Mopar original ones and they all seem to fit together. I have repaired and modified countless harnesses, both GM and Mopar with used plastic connectors that I salvaged off original harnesses and spliced in new wire with new above stated connectors. I have used the #59 terminals with original plastic connectors for modifying the headlight harnesses with relays.

Not sure how to explain it, but never had an issue. They all click into the plastic connectors without issue.

I looked up Pico, and all I saw were # 58 terminals that just dont have the spring portion where the male terminal slides into.