For a start everyone should have one of these:
And plugs/leads made up so they can use it across all their aircraft/setups.
I use XT150 connectors to the unit, as you want to start with the largest connectors you need, and then "work down" the sizes in your adaptors. Same adaptor steps for both ends.
eg XT150 to XT60 or XT150 to HXT4mm etc
That allows you to have adaptors made up for all your connector types, and the XT150 end is a 'zero impedance' to current flow (more or less).
This meter will give you real time Volts, Amps, Power, plus records Vm, Ap, Wp
It also records capacity that has flowed through (mA) and time.
You are still better off to VIDEO its display as you test, so you can go over all the numbers later on your PC, and get to see what truly happened across the time period.