i saw topic Help with Flipsky 65161 75200 and VX3
but stil strugglin with the wiring. (75200/65161/VX5)
i used port #2 /servo,5v,GND/ for connecting the reciever VX5 (flipsky info 
)so this is only ppm , wil not use it any longer (no battery info)
(weekend)
today found the right wire settings ,i guess i am on the right track now🤗
port 2 only PPM , port 4 ok for uart
Possible to plug kabel in on the right or left sitde (it leaves 1 pin open)
open pin right = 3V so not ok
open pin left site = ok for VX5 reciever and uart
color code reciever
reciever plug
not just plug and play 
pff but happy i got you all out there
tx
weekend i wil solder al the hardware together and give it a try