How To Connect ELRS Receiver to Flight Controller

Make sure the connection is correct like mine
Receiver -------- Flight Controller
5V(Red Wire) ------ 4.5V/5V
GND(Black Wire) ------ GND
TX(Any color) ------ R2(Here I'm using UART 2 therefore it is R2)
RX(Any color) ------ T2(Here I'm using UART 2 therefore it is T2)
For Tinning Pads use like 300°C-350°C
For Tinning Wire of 28AWG(in my case) use around 200°C