i couldnt find the green plug indicated in this link as on page two
http://hondata.com/downloads/04-06_flas ... nstall.pdf
so today i got busy with my multi meter and found where the CAN BUS links up
heres the CAN BUS on the ecu plug which can clearly be seen as the red and white wires which is twin core sheiled cable.

i buzzed those through and under the steering wheel on the right there are a bunch of CAN BUS connectors. the grey plug at the back in this pic

so if your retro fitting the tsx ecu and need to install the adapter harness you can plug and play into that :)
this is on my UKDM european CL9
hope that helps