@SnooDucksAudio
Sorry for these questions, but better sure than sorry.
Do you have a multimeter? If not, do you want one?
You know that electrolytic capacitors have polarity and how to connect them.
You know that you need to identify the correct + and - polarity in the zishan PCB ceramic capacitors you marked in red, you need to connect each eletrolitic capacitor leg with the correct polarity.
Please realize that all the opamps and the buffers power supply pins are connected to the same power lines. Meaning that their power supply pins are all electrical connected to each other.
So the factory stock voltage of +7V is the same for all of them, the -7V is the same for all of them and the virtual ground is the same for all.
Knowing the same stock +-7V goes to all of them, means you can safety use any capacitor rated at 10V or more for any/all of their power supply.
In the remote case you want to increase the opamps voltage and because you say you have physical space, I would just select and use 16V capacitors.
Instead of all those _local_ power reserve capacitors, why not just start by adding 2 bigger caps to increase the power reserve for all the opamps.
For example, add two 16V, 470uF each (or more capacity) connected at the default power reserve caps, those 2 lines of ceramic caps that are bellow the elnas in the PCB.
You need to connect them with the correct polarity. Use low ESR caps.
Also if you want to experiment with the capacitors in the audio path, you can try to replace those ELNAs in the PCB for the silmic II you have, use same capacity. Some people even remove those, but that's another subject.
For inspiration, take a look at these changes
@maxifuny did to his player:
https://www.head-fi.org/threads/the-zishan-dsds-corner.826185/page-186#post-15682101