I also soldered in a pin header to use the SE/30's LED with my SCSI2SD. I compared mine side-by-side with my Quadra 700 and though there's some age difference the power LED on the Quadra is definitely green and the activity LEDs are, near as makes no difference the same, and definitely yellow/amber.
Yeah looks like I got some bad info on that and jumped to the wrong conclusions. Sorry. Definitely no PCIe signals available at the AirPort Extreme socket in a late 2005 G5.
However if all you wanted was internal BT the rest of my post stands: you can just trace out the 5-10 USB lines and install a USB connector rather than run all of the unnecessary lines and find the special connector and then an adapter for whatever BT module you were planning to install.
Not many areas flaked off. I think I've now checked every trace and did find one bad connection. Patched that but got the same symptom.
All the joints were reflowed anyway. Even with a lot of flux and scrubbing the pins on the IC don't look great, but test okay.
I guess I can try swapping parts from one board to the other but I've probably already sunk more time into this than it's worth. Any other suggestions?