Go to the BP_SmartAIComponent and create a new variable called Range Shoot Sound and set its Variable Type to Sound Cue and tick Instance Editable.

Then go to the BP_AIMasterHoldable and create a new variable called Range Shoot Sound and set its Variable Type to Sound Cue and tick Instance Editable.

Then go back to the BP_SmartAIComponent and add the highlighted nodes shown in the images below, locations are at the top of the screenshots.