How are you tieing down your car in your enclosed trailer

I have an open trailer, but I went with the ones shown at Ultra Pack Tie Down Strap Kit with Detachable Axle Straps & they work great!
This is the same kit I bought. Really stout, no worries about stretching or loosening. I bought the direct hook option to get the ratchet closer to the bed of the trailer. Made in USA!! Great quality... and no, I don't work there...