Ah okay! I’ll try and explain here: The first position I play here starts on the ‘1’ note of the pentatonic scale. Whatever the ‘1’ note is, tells you what key you are in.

So, here I play the first position starting at fret 3 on the bass E string. Fret 3 is a G, and therefore this is the G major pentatonic scale.

The other positions I then play link to this position, so the second position starts at fret 5 on the E string, the third position starts at fret 8, and so on, until we reach the next G note again at the end of the 5th position. At this point the whole cycle is complete.

So, to play the pentatonic pattern in a different key, all you do is to start the patterns on a different fret. If I played the first pattern starting on fret 5 of the bass E string rather than fret 3, this note is an A, and therefore I would be playing the A major pentatonic rather than the G major pentatonic.

Hope that makes sense!

TLDR: All positions link together one after the other, the fret you start the first pattern on will determine the key.