[Luckypants]

Chris, either of the locations mentioned is good. You can fit on LHS of shock without removing the rear panels, so it easier.

Advantage of putting behind the rear panels on sub-frame is greater height, but adjusting the flow might be tricky.

There are some photos on here somewhere of both installations, but I can't find them. (useless)

FWIW I put mine next to the rear shock on LHS, it goes behind the little triangular plastic panel under riders seat. Worked fine.