The "should" have the torx head like Dan mentions. Although as long as they are the same thread it doesn't matter much.
Want to know why one is different, because someone over tightened something and snapped one. While I don't torque them into the charger either, I don't go very tight putting them in. My procedure is to screw them in by hand, then using a 1/4" ratchet or hand driver and the E-torx bit (a small regular socker would pass in most cases) I give them just a touch that snugs them gently. When you put the TB on the nuts will tighten causing the proper torque, just like DTM says.
(Dan The Man)
00 Regal GS: All kinds of cool stuff.