Researchable technology "Circuit Network" shows green/red wires as something unlocked by this research. See attached screenshot:

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Wires are actually available from game start and you have all circuit network functionalities available already.
This tech only unlock control ...

Great! That's the proposal I was about to do myself.
It would help me to setup wall train stops on demand and call the train (always waiting in a standby/refueling station) to the station whose network is giving a certain signal when ammo has been used by its firing turret.
An alternative would be a ...

I'm experiencing the delivery issues too and I've also noticed the "trash" system is always leaving 65 alien artifacts in my inventory. I tried collecting one more (66) and immediately a robot came to collect it leaving me again with 65 in the trash slot.
Same thing happens with many other items ...