This doesn't exactly address your question but if you haven't done so, a powered "buss bar" install is a good idea. I powered accessories from the battery but installed a relay on the accy wire to triger the buss bar to battery circuit when the ingition was on. Easy and effective.
kcrider
That is not a bad idea. where did you mount the buss bar and get the relay. I ran wiring to a accessory port thru a fused link to the battery, but it's hot all the time. I think I'll change it.