Evening all

Hopefully someone here can help me as I've never done anything like this
before.  I recently got a car that had some 6x9s (JLB's GTO935e) on the
parcel shelf.  The car didn't have a head unit in (the guy took it with him)
so I bought a Kenwood KDC6070 and stuck it in.  It's currently connected in
to the 4 factory-fitted speakers, but not the 6x9s.  I want to connect in
the 6x9s as well (or maybe instead of the current rear speakers?), but am
not sure where they should connect into on the back of the head unit.  I've
laid some new wires for the speakers, so do I just need to try wire them
into the same connector as the current rear-speaker wires?  The head unit
also has 4 phono sockets (rear L&R, front L&R), so maybe I should buy some
connectors and plug the 6x9s into these instead?

Also, before I bother trying to connect the speakers, the other question is
are they compatible with my head unit?  I've copied the manual information
below, but have no idea what I'm supposed to be comparing in each ....

Speakers:
Type = 6" x 9" 3 way
Speaker Impedance = 4 ohms
Power Handling = 100w RMS, 300W peak
Sensitivity (2.83 V,1m) = 92dB
Frequency Response = 50Hz - 21kHz

Head unit:
Maximum output power = 44wx4
Full Bandwidth Power (DIN45324,+B=14.4V) = 27wx4
Tone action: Base = 100Hz +/- 10dB, Treble = 10kHz +/- 10dB
Preout Level (mV)/Load = 1800mV/10kOhms
Preout Impedance <=600Ohms

Cheers,
Lyndon