Applying the Gauss Rifle charging effect SFX to another weapon

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I'm trying to edit another weapon to use a charging effect like the Gauss Rifle, but the weapon is totally silent as it charges and I can't seem to find out what exactly causes the charging effect to play. I've tried editing the weapon's keywords and making them identical to the Gauss Rifle to see if it would have any impact, but it didn't. At this point I have no idea where what would reference the charging sound effect and cause it to be played. I assume it's possible to apply to other weapons because mods like Legendary Modification can create a copy of the weapon (2LM Workbench version) and the sound functions properly. Can anyone help or at least give me suggestions of other things I could try?