Image localization resources

I am making a project for detecting cars in an image using FastAI. I have completed the classification part (whether the car is in the image or not). Now, I have to locate the car and draw a bounding box around it.
I tried searching about it but the results only include a FastAI course video of 2018, which I think isn’t useful as new course has been introduced after it. I cannot find the specific FastAI course about it. I also went through the contents of the book but still cannot find that part.
It would be great if anyone can help me with the Image localization resources.