There is no easy way to get to the drain. There is however an unconventional way to get to it.
This involves drilling a hole in the front of the HVAC housing above the drain. Then you can run a line down it and possibly vacuum it out.
Caution:
DO THIS AT YOUR OWN RISK!Before doing any work on the KK, disconnect the Neg (-) battery cable and wait 10 minutes!This will allow time for the airbag capacitors to discharge.
You don't want to have your airbags go off accidentally.
You will need to remove the radio bezel and center console to get to it.
(The main airbag controller is located under there also!)The location is in front of the shifter where the HVAC housing comes to the floor. There is a tab coming out from the housing with 3 ribs on it. Above that, is where a hole needs to be drilled.
I have not done this, But another KA owner chopped up the whole side of his Housing to find the drain.
You would need to make the hole a little higher then in the pic to prevent leaking at a later date. After it's cleared just plug the hole you drilled with an expansion plug.
This is not my Pic. Thanks to dainwatts for the Pic.

The post about it is here.
http://www.nitroforumz.com/threads/a-c- ... pet.41454/The KA and KK share the same HVAC housing.