What we do know is that it is (3) 200A Service Enclosures with Service Disconnection Means. Since this is a residence we are to assume (since we are assuming a lot already) that it should be 120/240 volt, Single Phase System. Anything else regarding the looping of a bonding conductor or what have you is speculation…not enough images of the RIGHT locations for me to comment otherwise.
If the final picture shows the GEC going out to the Electrode…I would have said do that in the common location outside (wireway) and utilize the “grounded” conductor for your bonding but again we can only speculate on what is behind the “Closed Door”…
And if we assume that is the GEC leaving the enclosures…then they is it running from pane to panel…?..is it in a metal raceway and is the GEC connected at both ends to the raceway per 250.64(E)…again speculation.
Quote on what you know and see…I can’t speculate on what I can’t see are my suggestions.