The #4 wire from the battery solenoid is routed to the instrument. The circuit breakers for the battery bus are daisy chained together. My question is how to terminate the #4 wire to the circuit breakers?
I could be off base here, but usually, the main hot wire terminates in the "buss bar" which is a strip of copper which spans the "hot" side of your switches.
Such is the case in many production airplanes
Power flows from the buss bar, through the switch, to a circuit breaker, and then to the item(s) you are powering on that circuit.
So, to answer your question, the main hot does not terminate in the breakers (normally).
Hope this helps,
JP