I am using Z-19 from the Aeroelectric Connection as a guide for wiring
my plane.  I would like to power the injectors from the battery buss.
Looking at Z-19, do I need to install a complete switch and diode system
for the injectors like is done for the fuel pump and ECU, or can I tie
on to the fuel pump OR the ECU system after either the switch (add a
separate diode) or after one of the diodes?
There will be the two DPDT switches to disable the primary and secondary
injectors after this connection.
My panel is becoming somewhat switch festooned and I would like to keep
more switches to a minimum.
How have you guys accomplished this?

Thanks.
Bill B