How to work mavlink camera zoom in&out or trigger etc

I want to work camera zoom in & out or trigger with joystick
I check joystick function(step zoom in & out, camera trigger, recording)
I carry out gimbal function (gimbal right & left & up & down)
I check mavlink Command_Long
I want to change the target_component in Command_Long. 154 represents Gimbal and 100 represents the camera, but I wonder if the target_component changes and the command changes when I press step camera zoom in on Joystick. If it changes, which part of the parameter should I modify?