Great write up! I plan to tackle mine this weekend or next week. I was lucky and bought new-old stock from someone who received the wiring package in their own hardtop deal, but his rig already had the wiring.
I know on my fuse panel I have a rear wiper slot that does have power, however I do not have the HBL slot, its a spare currently. Mine is a 97 which is why I am sure its a little weird.