mostly troll them. attach them directly to line with a good quality snap swivel. do not need to attach any weight as they will dive to around 20-25 foot depending on speed and length of line out. Im sure you could cast and retrieve them as well but havnt personally tried that. They can be run anywhere from 20 to 150 foot of line back on the trolling gear. just try to run them 3-5 foot above where you are marking fish. Precision trolling has an app that will give you dive charts for different lures. I would highly reccomend it.
When I say foot back measurements I am talking about the line out off of the line counter reels to help clarify

good luck