
Plug and Play Harness for Millenia EGR using MX-3 wiring
If you do not have access to a Millenia harness to hack off the EGR wiring harness, here's a plug and play harness you can make yourself by using the exisiting EGR and a signal light wiring harness from the MX-3.
Remove the wiring from the EGR and the 3-pin end from the signal harness:

Connect the ends to each other. They are color coded correctly. Red with red, black with black, and green with green:

Either solder or use butt ends then wrap in tape to clean up the wiring:

Black end goes on EGR:

Grey end goes on wiring harness:

Make sure you cut enough wiring from the signal light harness to reach the new location.