Where to mount tweeters? I have a 2004 Chevy Express van without factory tweeters. I am installing a set of JBL 601CF component speakers and want to know the best location for the tweeters? I can flush mount or use the angled adapter. Thanks for the advice!

Where to mount tweeters? I have a 2004 Chevy Express van without factory tweeters. I am installing a set of JBL 601CF component speakers and want to know the best location for the tweeters? I can flush mount or use the angled adapter. Thanks for the advice!