Take out the footwell trim on the drivers side(plastic cover on bottom of pillar,may have a screw in it)and it should be behind that,or slightly above it,will prob be clipped into a bracket.
It has an edge connector about 4 inches long,unplug that and take it out,and as soon as you turn it upside down,water will prob come out.

If it`s not there,try the pass side but pretty sure its the drivers side.