This was rather simple to install in one of the 2 available slots next to the Downhill assist button on my center console for my 2006 4-Runner.

Didn’t fit in the OEM slot well

Unfortunately it didn't fit nicely in the available slots on my tundra 2007

The problem was that I ordered one for a prius and the box said Toyota on iy, but didn't fit into any available slots

it went in easy and fit the slot well