I found this
picture. Are your like these or at least similar? If you look in the middle of the pkg. the pink or purple needles are pointing at a pin with a loop at one end. That should be the key for tightening the connection between cable and needle. There should be a hole in the cable end for it to fit into. I use a piece of grippy shelf liner to grip the needle tighter and get a tighter fit.
This is for Knit Picks Options but the idea is the same. Options Cable Key tutorial