The shapes, both major and minor, occur in every position ... and compare them to shape 3 of the major pentatonic scale, you’ll see the shared notes. It’s unlikely we’d come up with note ...

The reason for this is because the E7 features a G# note, the Major 7th in the key of A minor. Our A minor pentatonic and A natural minor scales by contrast feature a b7th interval, or G natural.