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I've done it and it's not too hard.
The connectors are different, jdm/eudm is an 8 pin connector (only six live pins), and the usdm is a 6 pin connector (only 4 live pins). So I de-pinned each and put all 6 pins from the jdm lamp into the 6 pin usdm connector. (I don't know the wiring off the top of my head but maybe I'll do a DIY write up.)
Reference: the wiring harness has 6 live pins but the usdm lamp is only using 4 (since High beams and DRLs are on the same line). The two unused pins are live when parking lights or headlights are turned on, so I pinned up the LEDs to those. And now I have full LED DRL and HID low/high functionality.
If you feel okay to take off the bumper and re-pin, it's not too bad.
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