THANKS EVERYONE FOR YOUR INPUT.
I did some testing in the battery compartment and found the house battery HI AMP BUSS 150A / WATERPROOF / CB185-150...
IT HAD A READING SIMILAR TO THE BATTERY READING. THE PLASTIC ARM
APPEARS TO HAVE BROKEN OFF AND WAS MISSING, I REMOVED THE HI AMP 150A BUSS FROM IT'S LOCATION, REMOVED THE 2 POSITIVE WIRES AND FOUND THAT
THERE IS A PLASTIC GEARED PIN THAT I ROTATED BACK IN AS THE PLASTIC ARM WOULD DO, AND VOILA....WE HAVE EVERYTHING WORKING AS DESIGNED.
WHEN I CHECK THE SIMILAR BUSS FOR THE CHASSIS BATTERY, IT HAD NO READING UNLESS I PRESSED THE RESET AND THE PLASTIC ARM SWUNG OUT, PUSH THE PLASTIC ARM IN, THEN NO READING.
It appears then when I put the positive cable on with 24 volts it must
have engaged/disengaged the breaker, but did not show because the plastic arm was already missing.
Therefore, we did not travel all day with 24 volts in the house system, only the chassis battery was functioning, thank god, we're so lucky to have that battery Hi Amp breaker do it's job right away.
Again, thanks everyone so much for your assistance in getting my brain gears going.
Eugene.