A few more pics with notes that may help, depending on what you find. For convenience I wired in an identical plug to the one on the drivers side on the passenger side, so both the illuminated plates are plug 'n play..
Thanks Tango. I installed the scuff plates this afternoon. The job did not take too long as I already had plugs at drivers side and passengers side. However, with the pics provided by Tango, I connected (tapped) the white wire of the plugs to the B-pillar wire in both cases. Working beautifully.