Stop in for a cup of coffee

So a question in hopes I sound a little smarter tomorrow when we put the dash back in.
Think I told you the PO had a mechanical aftermarket under dash water temp/oil gauge. Its gone.
Tested the dash gauges with the Hoppy tester and they worked. Plus dash and gauges were rebuild a few years ago at some high dollar place that does great work.
SO question wiring for the oil sending unit and temp unit on the engine goes through the fuse box to the dash gauge?? Or not what it the path is......the short version.
The only fuse for the instruments I think is the supply to the voltage reducer on the panel. The bundles between the sending units and the gages go direct. Going through the bulkhead connector is considered direct in this context.