This is an excellent sight for answers.
https://modelagarage.com/electrical/
If your lights aren't connected. Make sure that the light switch, associated wiring, and lamp assemblies are all connected properly and that the wiring is in good condition before switching the lights on.
On an original amp meter, just turning on the ignition should show a slight discharge unless the points are open. Cranking the starter will make the needle swing back & forth until it starts.
With the different types of cut out products and also the Fun Projects voltage regulator that looks like a cut out, a person needs to know what they have there. It can affect how the amp meter indicates a reading.