I bought a 2014 1000 with an MTX stereo in it. The radio works but has terrible reception. Is the an antenna a guy can buy for it? If so, does it plug into the harness? Also, the machine has a Polaris Lowrance GPS in it as well, I can’t get it to work so I checked the wiring. The only wire hooked up is the power wire. Does this unit have to have an external antenna? There is another wire with a few little wires hanging out of it. Does this go to an antenna? Or am I missing something else? Thanks, Dan