I agree it’s not a wise idea to try and fully connect both ESCs. Theoretically the current capability would double, the Voltage would not change, bbbbbbut…… One concern with having 2 ESCs attempting to power one receiver is the outputs are essentially directly connected. Any slight difference in Voltage between the 2 ESCs BEC circuits can quickly result in a lot of current between the 2. At least one of the ESC BEC circuits would most likely lose the battle and let out the Magic Smoke.

It is possible in certain very specific circumstances to connect 2 outputs to a load, but it is certainly not recommended general practice.

Like mentioned, at the very least need to pull and isolate one of the red wires. Don’t know if that solves the link issue.

To get more power for the servos, you might need to pull and isolate both red wires, then use a receiver battery or an appropriately sized external BEC. Either seems awfully complicated of course.