The DQ-61 signal delay function is calibrated for left hand driven cars. In order to be able to use the signal delay function for right hand driven cars, we need to re-wire.
Specifically, we would need to flip the left and right inputs of the DQ-61 form the factory system.
You would take the left output of the factory system and connect to the right input of the DQ-61, and the right output of the factory system and connect to the left input of the DQ-61. You would flip left and right again when connecting to the aftermarket amp. Left output of the DQ-61 will then go to the right input of the aftermarket amp. Right output of the DQ-61 goes to the left input of the aftermarket amp. Check out the diagram below for further reference.
Click on the diagram below to enlarge
DQ-61 product page