u got 3 options the way i see it, the A pillar, pll it out check they will fit, then u can go from there using a holesaw and wat not
in the door trim, again find a decent mounting place and go for it, or the dash
if u don't wanna drill, u can glue the mounting brakcets onto the dash and only drill a small hole for the wires, or you can mount the tweeters in with the drivers which i wouldn't recomend