Just replaced the front(51KSC6904) and rear(51KSC6504) speakers. I used the harnesses OP mentioned. But I used the brackets from trail grid pro. I also used their video to figure out the disassembly of the front and rear doors.
The OEM head unit is not powerful enough to run aftermarket...
There is just enough space to mount the dongar under the rear view mirror shroud. I placed mine outside the shroud just for ease of access. It doesn’t look as clean but I’m ok with it.
Installed a garmin mini 2 dash cam using the @Dongar pro adaptor. The SR5 does not have a 10pin connector. The 5-pin Dome light is the only one available to tap. Removing the rear view mirror shroud and dome light enclosure is necessary. This has been demonstrated and detailed in other threads...
I emailed autoharnesshouse.com and they confirmed that their jumper harness is compatible and updated their website to reflect that.
https://www.autoharnesshouse.com/store/AHH-2477