Personally, I would just install this and call it a day:
https://www.amazon.com/Clear-Grill-Bumper-Wiring-2005-2010/dp/B01M1JO7R5/ref=sr_1_3?dchild=1&keywords=2006+scion+tc+grill&qid=1633626251&replacementKeywords=grill&sr=8-3&vehicle=2006-91-2497------------&vehicleName=2006+Scion+tC