I have not used that port. I have read posts about it being available with power. But I think you will need to either fashion a connector to mate it or splice into it. I have not read anything about what it could be used for by Tesla. Personally, since the MS is new tech and so complicated, I have decided to not splice into anything, for fear of screwing something up. Even though it is only a 12V connection, who knows? I used the one above the mirror to power my dash cam, which was easy. All I did was pop the connector open, lay my wires in and snap it shut. From the looks of the one behind the 17", I don't know if it would be that easy. When I installed my radar in the front nose cone, I did a simple, no cut tap into the fuse box under the top cowl. Both have worked with no problems.