stereo hook up

[newblueowner]

ive traced all the wires for the new stereo install but i have a small problem im hoping someone on here might know. first off... are there rear speakers cause i dont have the wires to hook any up... and second does anyone have a wireing diagram or know of an online diagram for 89 4runner? i just bought one and its pretty much mint so i dont want to do ANYTHING wrong. bought it with no stereo so im trying to get some tunes goin.
thanks for any help anyone offers.