Doesn't matter. Hit! Hit! Hit! He can play SS in club ball or showcases etc. What you don't generally get to do elsewhere is prove your metal at the dish. What's most important in HS IMHO is getting those ABs and proving that you can hit against Varsity competition, and do it well Vs players hat are being scouted for their pitching. Learn as many positions as possible, and HIT!
At all levels above HS, players rise to the top because of what they can do with the bat. THAT, is the hardest thing to do in baseball. What they do everywhere else is a separator and that can be evaluated first hand.... Hitting is about where you've been an what you've proven.