Help- Basslink install in a Subaru Wagon

Wow those were some good photos, now I know where you’re coming from. And no you’re not going crazy you’re actually headed in the right direction. The way I would suggest doing it is your # 3 option, mounting a piece of MDF under the panel and then fastening the basslink through the panel and into the MDF. When you cut and mount the MDF just be sure to check and see if the hatch will still open and close before screwing them together. The only problem I could see with this is the umbrella compartments top panel might vibrate with the bass and you may need to fasten it down with Velcro. But I would defiantly try option 3 and see how it goes; I defiantly think it’s a winner.