Got the harness in the mail today to make this happen, has a weatherproof plug that appears to plug directly into the 262 antenna that adapts to a harness that has a power wire on it and goes down to the serial port on the Ag leader display cable, both serial plugs are male and there are no empty ports on the antenna since I have a Radio under it that's plugged into the other port, what gives? Do I need a "Y" or something coming out of the antenna?