If the D1 is like the D2, I don't think you have the fasten points in the floor for the seats... You may have to pull back the carpet/plastic to check... If there are threaded holes, then it is just a matter of attaching the seats to the rear quarter and to the floor... Make sure you use Loctite on the threads and torque them properly...
From RAVE, the rear quarter is 16 ft.-lbs and to the floor is 33 ft.lbs...