White Park,ctree, I bought the auxiliary harness from Honda for a little more than $5.00 and used it to feed a relay off of my winch contactor which is mounted on the front of my Pioneer. This harness replaces the factory harness that supplies the power plug. It is a switched wire that is only powered up when the key is on. This may be an option for you.
Looks good.Got the rocker switches installed for turn signals (2) & 2 aux switches for later use. Pretty sweet setup compared to other option that I tried.