I have an "Jeff Anderson" CB antenna splitter that was mounted in our car and we are not going to be using.
Includes the splitter box and the jump wire (w/ clam-style clamps) for use on a power antenna.
I do not have install instructions as they did not come with the car when we bought it.
This was mounted in a '95 NA but might be able to be used in other models, so do your homework.
$30 shipped in the lower 48.