wiring for 1979 olds cutlass

hey I have a 1979 oldsmobile cutlass supreme and the wiring for the head unit is not like the standard rectangle plug and I have no idea how to connect the wiring on the beast.  The wiring plugs that are present on the car are 2 round connectors with 5 or 6 wires each and I have no corelation as to what that they would connect on the now standard rectanglular plug.  Any help would be greatly appreciated.

Hey wildbilld, I suggest to look beyond the connectors for the typical GM colors as follows: Wire Color = Function GRY = Speaker Return Left Front TAN = Speaker Feed Left Front DK GRN = Speaker Return Right Front LT GRN = Speaker Feed Right Front BLK = Ground PPL/WHT = LED Dimming Signal GRY = Instrument Panel Lamp Feed YEL = Fuse Accessory ORN = Fuse Battery PNK = Power Antenna On     LT BLU = Speaker Return Right Rear DK BLU = Speaker Feed Right Rear YEL = Speaker Return Left Rear BRN = Speaker Feed Left Rear Prepare your future. It wasn't the lack of stones that killed the stone age.