I'm kind of lazy this evening (its 11PM here) .. but at first glance ...
Your internal stereo speaker appears to be at node 0x1b
Node 0x1b [Pin Complex] wcaps 0x40058f: Stereo Amp-In Amp-Out
Control: name="Speaker Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=Out, idx=0, ofs=0
Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
Amp-In vals: [0x00 0x00]
Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
Amp-Out vals: [0x00 0x00]
Pincap 0x00003734: IN OUT Detect
Vref caps: HIZ 50 GRD 80 100
Pin Default 0x90170110: [Fixed] Speaker at Int N/A
Conn = Analog, Color = Unknown
DefAssociation = 0x1, Sequence = 0x0
Misc = NO_PRESENCE
Pin-ctls: 0x40: OUT VREF_HIZ
Unsolicited: tag=00, enabled=0
Power states: D0 D1 D2 D3 EPSS
Power: setting=D0, actual=D0
Connection: 2
0x0c 0x0d*
But there's also a Mono speaker there? I have never seen a dump of 269 with such an option. S/PDIF - sure, but extra speaker?
Node 0x17 [Pin Complex] wcaps 0x40050c: Mono Amp-Out
Control: name="Bass Speaker Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=Out, idx=0, ofs=0
Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
Amp-Out vals: [0x00]
Pincap 0x00000010: OUT
Pin Default 0x90170120: [Fixed] Speaker at Int N/A
Conn = Analog, Color = Unknown
DefAssociation = 0x2, Sequence = 0x0
Misc = NO_PRESENCE
Pin-ctls: 0x40: OUT
Power states: D0 D1 D2 D3 EPSS
Power: setting=D0, actual=D0
Connection: 1
0x0f
If you can see the output in system preferences > Sound then you are missing something in the patmaps\pinconfig.
Try using 01B71C40 01B71D01 01B71E10 01B71F90 and just for the sakes of it try adding EAPD 01B70C02 , since HP and speakers are usually tied together.
As for layout-id its pretty much up to you what you use. I prefer 28 (1C) for no apparent reason other than MBP8,1 uses this number and I'm conveniently faking this model.