Usually they are in the 1st or 2nd levels when you drive into the Interpark garages. I think they would be on the Van Buren or Franklin entrances of Traders. They could be at the ground or basement level the Wells side. Best to telephone Traders and have the attendants tell you for sure.
EV stations are located on the Wells side. Enter the garage and 1/2 way up the ramp between level 1 and 2 on the left side.
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