i got sirius for my car and i looking to hardwireing in to my head unit. what do i need to do this

 

What headunit and what model Sirius radio did you get? If it's the stock headunit, it may be difficult to work unless you have the Sirius unit you can buy from the dealership.

https://www.scionlife.com/forums/viewtopic.php?t=127147

(Currently) all Scions use the same radio.