Just tell your kid's coach and the coach can set things up with the prep coach - usually.
You say your son is more interested in the academics, but you don't say how good a student he is. At the better academic schools, the coaches are very interested in kids that can actually be admitted. That means really good grades and very high test scores. [The better he is as a player, the lower the grades and scores can be within reason.] Go to the school's website--there's usually a link to submit your interest in the school to the hockey coach, where it'll ask his grades, scores,...etc. If your kid looks like a good fit, the coach will probably get back to you pretty quickly.