According to the factory wiring diagram, the 2V per cylinder V6 does not have a starter relay in the engine compartment relay box. Only the 4V per cylinder V6 and V8 SHO cars have the starter relay in the relay box.
As for the battery drain, you'll need to measure the drain to confirm something is draining the battery, then pull fuses 1 at a time to determine which circuit or circuits are drawing significant current.
-Rod