Vin # blocked
Moved your photo out here for easier viewing, I'm thinking that you may need to pull the dash top off to get at that. Here's a link to a thread on removing the dash top, its not a five minute job.
https://www.chevyhhr.net/forums/audio-video-17/removing-dash-top-36135/
Its an interesting problem, time for some forum brainstorming.
https://www.chevyhhr.net/forums/audio-video-17/removing-dash-top-36135/
Its an interesting problem, time for some forum brainstorming.


