No that is not correct.
In your image it shows you referring to 4 different entities:
dr_laser_sound_1 0
dr_laser_sound_2 1
dr_laser_sound_3 2
dr_laser_sound_4 3
What is being suggested is that you have one singe sound entity (ambient_generic most likely) named:
dr_laser_sound
Then, in your multimanager you fire it 4 times. It will then look like this in your multimanager:
dr_laser_sound#1 0
dr_laser_sound#2 1
dr_laser_sound#3 2
dr_laser_sound#4 3
(note that hammer will add the # numbers to the "dr_laser_sound" key on its own. Just add the four different "dr_laser_sound" keys and their times and hammer will take care of the rest).
Also note, than you will probably want the "Not Toggled" flag set on the ambient generic so that each time it is targeted it plays the sound, instead of being turned on and then off with each triggering.