I just used wire connectors, and connected a 3 wire pigtail to the harness behind the obd port. So I can use the obd port and hook the palm into the 3 wire pigtial.
But I switched out the 3 wire pigtail and put in a female 6 wire pigtail, but only used 3 wires.
The male end of the 6 wire pigtail has 6 wires from it. 3 go to a 9 pin serial connector wired with risistors and diodes for the palm. The other 3 go to another 9 pin connector wired with the 2 and 3 reversed, for the laptop.
So I can reach down , unplug and spin the connector at the obdport, and have 2 serials hanging from the dash. One for the palm, one for the laptop.. and then one more from the ostrich.