The horizontal coils are placed at the bottom (batt connection end) of the carto. The atty wire is wrapped/coiled around the wick. Personally, I can't use this type on a kr808 batt without it burning. I've tried Nhaler jumbo, Ikenvape mega and Bloog MF. All do very well on my Elegant Easy (which is a kr808 Ego type fatt batt) because it is much lower voltage, even fresh off the charger, than a kr808. YMMV though, so give them a try. By the way, what kinds of juices and blends of PG/VG are you using?