My 2022 382WB doesn't have the "secret door", but burgpath's photos and description worked like a charm for me. One problem I have is that my stereo head is the Rockford Fosgate PMX-1. Rockford said to connect my Polk Signa S2 into their "front line out" but there was either no signal or not enough signal to power the S2 through the AUX jack. I should mention that I wanted the sound bar & subwoofer not just for movies & TV but also for music. That's why I didn't connect the S2 directly to the TV. Anyway, my solution so far is to wire in a Kicker LOC to the interior speaker wires. This gives an adjustable level out to the S2 via RCA connections. Works like a charm except I cannot adjust away a low "hum" from the S2 while at rest or between music tracks. Frustrating and still working on it. Overall with music or TV the sound is fantastic. The wireless subwoofer sits behind the theater seating and works great.