A plug in connector has a male and female slide that slide in and out of each other
That's one point of possible high resistance.
The wire attached to each of the male and female connectors attaches with a crimp.
That's two more points of possible high resistance.
If you look at the crimps they they are really wimpy and they are not soldered either.
A butt splice is a one piece round barrell that has a wire inserted into each end and then crimped with the proper tool.
If you use a non-insulated butt splice you can then solder it after crimping and apply heat shrink or electrical tape.
Done properly a butt splice has lower resistance than the wire itself.
Rusty
Check my post under "what did you do to your Vmax today" for what and how I did it.
Thanks for the info Rusty... Looks like I'll be adding that to my list of mods this summer with the new battery.