Hi Rob,
Thanks for the post.
One of the links in there to the Command Service Module (CSM) Functional
Integrated System Schematics Block II Revision K was also interesting to
browse in its own right.
Link :-
https://www.ibiblio.org/apollo/Docum...vision%20K.pdf
For example, on the "Engine On-Off" (section reproduced in image below) you
see the use of so-called "Deadface Connectors" between the Command
(CM) and Service Modules (SM).
Extremely reliable, robust connectors designed for the space industry,
they are designed to provide electrical isolation before physical separation
such as in this case where the CM and SM separate prior to re-entry.