Be careful: all systems on ostensibly identical aircraft may not be the same
Very much so.
I did tend to try and state that I was generalising as there is a huge variety of GA aircraft.
Probably all the moreso now as new generation training aircraft are starting to appear.
I know of a Tomahawk with twin impulse couplings, Slickstart on the left mag, and with the ignition switch link opened.
An otherwise identical sister aircraft has the more conventional single impulse.
Going back to charging and electrical systems, - one has the PEP (Ext Pwr) socket and the other does not so quite a difference there also.
I think those two aircraft would be a good graphical example of how the AFM may not accurately reflect the installation on that particular machine.
Many pilots would possibly be unaware of the differences, especially on a training aircraft.
I am not a big fan of turning the alternator off and on as a check after start-up. I would not allow it on my own aircraft, - preferring the landing light to be operated instead. I monitor bus voltage during flight with the Pilot III displaying supply voltage. Some aircraft, like the Tomahawk, also have an Alt Inop light.