One 50Mv 500A shunt, two ammeters?

I'm not concerned about accuracy under 2 amps.

I should not have bothered pointing out that my 100 amp project meter was inaccurate under 2 amps.

All I care about is whether 2 50Mv Ammeters can be hooked to one 50Mv 500 amps Shunt, which is already in place for my battery monitor, and which does accurately read currents under 2 amps.

But since there does not appear to be an inexpensive 100 amp ammeter that uses a 50Mv shunt.........

If I could have an inexpensive dashboard digital ammeter without wiring up another shunt, great, If I can't, I'm not going to have a hissy fit.

If two different meters cannot use the same shunt, I was hoping to learn why, and further my understanding of things electrical.

Remember, these meters are just (milli)volt meters. They certainly should have a high enough impedance that 2 won't make a difference- they should put no load on the shunt. If I can measure a current draw using a fuse as a shunt, it should be easy.

Anything accurate at 2amps shouldn't handle 500 amps. I would be suspicious.

Look for a milli-ammeter for under 10a, and use the big boy for the heavy stuff.

At 2 amps or less who cares how much your alternator is putting out? OH, you do, but not sure why.

That is basically the 100a meter I used on my project that was inaccurate at 2 amps or less and could not read amps below 0.8a.

I do not want to have to rewire my system to accommodate another shunt, but if I could just run some new twisted pair to an inexpensive 50Mv Ammeter from my existing shunt and have it be somewhat accurate, I would do so

I'd put a on/off/on toggle switch at the current location so only one is in the system. You could switch back and forth to check accuracy of the new one...
Or for $10.33 you can buy a shunt and digital V/A meter like what I installed when I put in a home refer here.

I'm having difficulty even finding a 50MV digital meter. I have found a larger analog meter but for 70$, I am not really interested, and implementing it on my dashboard would be more difficult.

I had employed a 20$ Drok 75MV combo v/a meter on a separate project, and it was not accurate at amperages less than 2, but well within my acceptable expectations for monitoring charging current.

i have never seen this done
it would depend on the input impedance of the two meters
at a very high impedance on both meters it might work
there is no guarantee the readings would be exactly the same
but should be close enough for monitoring, while driving