lol, getting more complicated now.... All as far as I know,
1 battery to feed 2 esc can be done. Each esc to a single motor - Yes, OK But... on one of the esc you need to break out the red lead at the servo/rx plug - you only want the signal and the ground to one esc. The receiver will take it's power from the other (fully wired) esc and power both servos if sufficiently powerful. Under no circumstances are the 2 esc red wires to come into contact with each other, they will fight each other, not combine.
The servos will need to be connected to the same channel for them to operate together, assuming 4 wheel steer and not independent steering? The red lead I mentioned to remove on one ESC, you could use that to power the second servo and remove the red power lead and ground from the servo loom, allowing only the signal wire to go to the receiver.
It's easy to get wrong but not too difficult in the general scheme of things. Some plugs are brown for power others are red. Signal is usually white or yellow. Take your time, I think I'm right, multimeter it if you can to double check.