For direct drive the emitter needs to be on a copper board or it will fry. So if that is arranged, use your solder iron and clear the driver board from components (or do that in a pan on the stove). Find one or more via's through the board that goes to the +contact plate and connect them with some wire (one via may not be conductance enough to accomodate the 5+ amps that you expect from direct drive), solder the +wire to lthe led to those. I did the same with the -contact ring. Also you can use some copper braid soldered to the top and bottom of the tail spring to improve conductance there. Basically for direct drive you connect the + and - from the battery directly to the led, while removing conductance-bottlenecks underway.
For a bad looking but good working example of a direct drive mod I did, look here.