OK first off, that's the passenger side pillar (the picture is flipped horizontally). Secondly, there isn't a whole lot of room behind the plastic, maybe 1/2 - 3/4" in that location so you'd probably be hitting metal with the back end of the outlet.
What I did on mine was to run the power cord up thru the radio section of the dash, then I pulled the front strip of the dash (where the defrost vents are) off and took a hot-air gun to the section where the power cord would come thru; heated it up until it was soft (but not melting) and used the shaft of a 3/8" extension to make a small depression/channel that the cord could come thru. Worked great until I got a new cord that also has the data connection to my laptop - that one is just run behind the knee bolster and up around the left side of the dash (because I've been too lazy to take the dash apart again

).