Initiating the playback of a toggle through another onClick button

,Hey, I am currently making my 3rd version of a simple music app. Its very simplistic right now, and I am currently trying to figure out why I cannot set an audioclip as a public var to initiate through a button click. The toggle is for a resources.load call. The toggle works, as you can see,

Currently, this is my code, for the toggle I have this script, and I am wondering if it is possible to set this code to global variable or not? Its very frustrating

If someone could help me figure this out. I know the audioSource needs to be initiated in a audioSource.PlayOneShot(a) method, but I am wondering if it is possible. Thanks