Greetings fellow forum members. I am hoping there are some electronics gurus out there. I have a newly acquired Skeeter Bay boat with a lightly used F250. I am in process of updating electronics. Looking to interface the motor with a Garmin Echomap through the NMEA Connection. Everything I have researched says Yamaha started including the interface BUS starting in 2006. I have only found one potential interface plug not already in use. See pics. Looking to see if anyone can assist in determining if this is the correct interface plug. Thanks for any input!