Got the TRD switch installed!
One thing I found out about the swap from the Advanced keys system. The newer Toyota's use a different switch type. When I ordered the switch from Japanparts I thought it would be safe to order the one for the GT86. Heads up the GT86 one does not have the status LED on it. The GT86 and BRZ limited use an LED icon in the cluster..... Damn should have bought the TRD switch with the LED indicator. If I did it would have been a direct swap.
Moral of the story if you want this switch order the one with the LED indicator......
After taking a quick look at the wiring diagram it is not that simple, because it has data sent to the cluster IC and not a simple signal wire. I haven't given up yet.... stay tuned.
Here is a pic of the FR-S icon which we have......
Here is a 2013 Rav4 for reference