Not strictly circuitbending, Home Mini System Aux Input Install

[MrSoul]

Hi,

Sorry to dig up this post, but I'm on the same project and there are really few people who have made these kinds of modifications.

After watching this video (https://www.youtube.com/watch?v=DTus8kwXA8U) and working on the Service Manual (https://elektrotanya.com/panasonic_sa-pm21e.pdf/download.html), we can see that it is possible to solder a jack on the tuner circuit: TUNER_LCH(5), TUNER_RCH(7), and PORTSEL(1) (which seems to be in bridge with TUNER_GDN(10)) for ground.

I deduce that it is possible to solder a jack on the k7 audio circuit: PB_LCH(6), PB_RCH(, but for the ground, 9VGND(19), or VREF-(11)+AGND(10)?
Or on the CD drive: CD_L(17),CD_R (15) and D_GDN(12)?

You think I'm right?