To get the TV off the bracket, look at the lower corners of the bra key. You should see a screw on each side that comes out, unlocking the bracket so you can lift the TV off the main part of the bracket. Not sure you're going to find an optical out connection, though.
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2015 Legacy SR340 360RB with 2014 Wrangler Unlimited Toad
Gigi, Poppy and Sadie the Jack Russell (all 14 lbs of her)
2015 Legacy SR340 360RB
2014 Jeep Wrangler Unlimited Toad
Gigi, Poppy and Sadie Lady...On the road, but not full time!