Hi ,
I can configure kk2.1HC same as kk2.1 board. ? Both are similar. Can anyone suggest me.

Hi,
My configuration is

FC: KK2.1HC
Transmitter: FlySky 9ch
Receiver: Flysky R9B
esc: emax simonk 25a 5v bec
Motor : hextronic dt750

My queries are:
1. I will connect the esc from Motor 1 to KK2.1HC M1 output, should I need to remove the red & black wires from all other 3 escs. ?
2. In the receiver flysky R9B they have mentioned ch1, ch2, ... how can I find which one belongs to AIL, ELE, .... ?
3. In the simonk esc, the 3wires mentioned as A, B and C. Can I connect any of these wires to motors. ? I read in some posts, that we can change it later to change the motor rotating direction. but just to confirm ?

1. You do not strictly need to remove the red wires (from what I know of the regular kk 2.1). This is because the M1 pins are on a different 5V bus than the other M pins.

2. You need to check your transmitter manual/settings. From what I have seen, the channels usually are:
1-AIL
2-ELE
3-THR
4-RUD

3. Yes, you can connect them in any order. To reverse the motor direction just swap any 2 of the 3 wires.

Remove the red wires from the remaining three escs if the BEC supply is a switching bec...(mainly high voltage esc have a Switching BEC)
But EMAX esc have a linear bec so you can keep the red wires on!

Note to OP... please do NOT start multiple threads on the same topic.