Are these speakers in the dash of my '96 Previa?

[schultzee]

My new to me Previa, year 1996 has grill holes on the front right and left side of my dash. But I can't figure out if they are tweeters or what?
Can someone tell me what goes in them? I am going to replace my front door and rear panel speakers but need to find out if I need a component system for the upfront?

[edmyers]

i think they are mid range speakers and you should also locate a wiring diagram. i found a second speaker connection in the dash for a power amp, and didnt hook up the radio up right.