The cdt cl-69s has RMS of 80watts. If the wattage to the stock (4 ohm) door speakers is ~ 30 watts, wattage to 2ohm speakers should be ~ 60 watts, plenty to push them. quite a few guys on here have done a speaker switch to those, with no additional amplification.
All the factory speaker wires are a solid color wire (positive) and another of the same color with a black stripe (negative). Ex - front left door is yellow / yellow black. the harness has white and white/black wires. So, the yellow should match up to the white and yellow/black should match up to white/black. On your new speaker, white goes To Positive, white/black goes to negative. If they DONT match up, you have to switch the wires in the harness, or just direct wire to the speaker.