In Mission Planner motor test on the buttons that spin the motors, there are letters, in my X8 drone for example, the letters A-H, but in the drone log file, when checking variables that relate to the motors or ESCs, there are numbers such as C1 motor1, C2 motor2, C3 motor3 etc…

Is the correlation a simple one to one:

A–>C1

B–>C2

C–>C3

D–>C4

Etc…

Or is it not necessarily such a straight forward correlation, and if it is not so, what is the simplest and fastest way to find the correlation between the letters in motor test and the numbers in the log?