With a torx bit adapter on a 1/2" drive ratchet wrench. The torx bit adapter for that size bolt has a 3/8" drive size opening so you'll need a 1/2" to 3/8" adapter. I say to use a 1/2" drive ratchet instead of a 3/8" because that particular bolt is held in with Locktite so you need more leverage against it that the 1/2" ratchet drive can provide. You'd have a little trouble breaking it free with a 3/8" drive ratchet wrench.
Keep downward pressure on that torx bit since you don't want that bolt head stripping out.
It's tight in the back where those bolts are but not tight enough you can't get the bolts in and out, I've had my seats out out 7-8 times over the years.