Ohh, gotcha. It's the dash that prohibits in the installation, not the JDM trim piece.
I have the Metra 70-8901 and 71-8901 forward and reverse radio harnesses currently. Since you don't need the reverse harness for this type of install, would it be safe to say that I could depin 3 of the wires from this and snap them into the I88 connector on the JDM piece? Then, those 3 wires would be tapped into the corresponding leads on the 70-8901 forward radio harness that is wired into the radio.
Can you verify if the i88 connector has the same type of pins as the metra reverse harness for me?
The 71-8901 Reverse Harness is on the right.