I might be way off with this 1 but i think 'speed pulse generator' is just a fancy way of saying 'wheel speed sensor'. It's just that sat nav systems need to know the vehicles road speed.
If thas the case u just need to run it into the sensor harness... Somebody please correct me if i'm wrong...
Be careful it doesn't cause any unwanted ABS or T/C faults tho...
Good luck...