This SF6-SPSR1 Optional Parts 60/40 Split Plate from FSR has two 20 amp pre-wired receptacles with 16" wire lead, on a right sided sub-plate for the 6" Fire-Rated Poke-Thru floor boxes.
This series of floor boxes combine flexible options via recessed mounting bracketry and various subplates such as this SF6-SPSR1, to accommodate a wide assortment of power, data and audio connection options.