I just bought a tz 14 and gps 330. Need some help n wiring the two units up. Got the machine flush mounted and deck mounted the GPS. Now the wiring . Have some great diagrams in the box for navnet 3d but not much for the TZ. I am going to set up a simple NEMA 2000 system and plug the gps into that. Where does it get power from that 18 pin cable?? First off the cable for the GPS is to short, can I just buy a 5 foot NEMA cable and extend it? Thanks for any help you can provide.