What is your husbandry and setup like? Since its the first week that he is at your place, it's really important to let him settle in and get the husbandry spot-on.

As far as him not having eaten for 2 weeks, that sounds fishy to me, because he wouldn't lose that much weight in just 2 weeks.

Don't force hydrate him, you probably won't see him drink. I haven't seen some of my snakes drink in over a year. They're just more active at night, so that's just when they drink.

If you ask me, just keep a water dish available and maybe keep the humidity on the high side (like ~70%) to try to keep him well-hydrated and maybe even allow him to get that eyecap off. For the food, try and leave him be for another 5 days, and try something different, like try mice and rats, try F/T and live. If you can't get him on any of those prey items, give ASFs a shot. After you've exhausted all your means, or things seem to be getting worse for him, then I'd suggest force-feeding.