Ok the images didn't post right... Sorry
As I was saying...
Here are the connection types I have:
Voltmeter attached to connector 1
There are four pins in the voltmeter
I also have the little adapter that plugs onto the voltmeter. It has six pins that are more closely spaced than connector 1 but fit perfectly into connector 2. Problem is the voltmeter doesn't read anything. I know there's power there because the battery has sufficient power to taxi the Super Cub up and down my street.
I don't have any concerns about chargers and the XT60 plugs, it's the little plugs that have me wondering.
as always, noob latitude is really appreciated.