This is a total digression and actually fun.
Yes that connector is way overloaded on this build.
This concept of knowing electronics so well is one that I shared when I finished BSEE in 1972. Then I started actually working I found that most of what I had learned in theory applied only in distinct bands of application.
The principal that pushed me into physics heavy was the secondary grid emission and the idea of negative resistance in a triode tube. https://en.wikipedia.org/wiki/Tetrode
We take so much of knowledge for granted.
In electronics we have Conventional current flow postulated by Benjamin Franklin that causes us to still teach the water in a pipe metaphor for electrical current. And we mark energy states as + or - to indicate direction of Conventional current. We point our semiconductor schematic arrows this way. We use false statements like higher potential and lower associated with the plus and minus.
We discovered that there are electrons and nuclei in atomic theory and assumed that electrons are flowing as negative charge carriers. Bohr planetary model. But the theoretical construct of an electron is a quantum not a thing but a measurement or potential of having the measurement. If current flowed in the form of electrons moving from atom to atom the reaction force would also be at the speed of light and have infinite mass and inertia.
So the idea of electron flow is wrong.
If you look at the idea of information flow it might work but that's a whole doctoral dissertation.
The idea that Kirchoffs laws are laws is another one that is broken. Strontium-90 batteries are an example of where.
In cavitation there are some unexplored effects
In Super Fluids there are some more https://en.wikipedia.org/wiki/Bosenova.
Water changes dielectric constant when in a high magnetic field but remains diamagnetic.
SO the idea that anything in knowledge is fixed and the pinnacle is a false notion.