I didn't find a direct answer when I was looking earlier so here's some info on mounting your radar detector to your rear view mirror stem and then powering it off of the homelink wire harness.
I had this same setup in my 2011 Outback 2.5 Premium, but the wire harness is slightly different in the 2016 3.6R Limited.
My harness is a 5x2 and you want to tap into the black (ground) and brown (ignition) wires.
I've used both the blendmount and mirror mount mounts before. The blendmount is slick but functionally not worth twice the cost of the mirror mount.
Link to the mirror mount I use for my beltronics radar detector.
Here's the tap I used for my radar detector to avoid snaking a cable all the way up from the center console.
And some photos of it installed.
I had this same setup in my 2011 Outback 2.5 Premium, but the wire harness is slightly different in the 2016 3.6R Limited.
My harness is a 5x2 and you want to tap into the black (ground) and brown (ignition) wires.
I've used both the blendmount and mirror mount mounts before. The blendmount is slick but functionally not worth twice the cost of the mirror mount.
Link to the mirror mount I use for my beltronics radar detector.
Here's the tap I used for my radar detector to avoid snaking a cable all the way up from the center console.
And some photos of it installed.

