Use the grooves as guides to thread the body straight on. On a Ned head, slide it on in small increments and pause after it makes contact: the tail can return to its proper position without you having to jerk the rod too hard.
The material contains salt and the X Zone Scent attractant. To fish at a different depth, the drop shot setup maintains this low profile above the sinker. Avoid using too much weight: excessive weight reduces the time the lure spends descending.