I bought a small "Scout-Invader" downrigger at a yard sale. It's apparently unused because the cable end to go to the weight is not rigged, and I don't know how it should be rigged. There's a clip with a crimp but also a bushing and screw that was included in an unopened bag. I can crimp the clip to the cable if that's how its supposed to be, but I have no idea what the bushing and screw are for. Can anyone tell me?