How do i revine my vine plant?

I want to make a new plant from the current plant. where do i clip the vine at?

How do i revine my vine plant?
Snip a runner just under about 1/4 inch from a joint, that's where the roots come from. Set it in water, joint side down. Within a week or so you will see little nubs coming off of the joint, that's your new roots. Give them a chance to grow, so when the plant is placed in soil, it'll already have a good start. There is also a product called Root Start that provides the vitamins and minerals to give your little start a fighting chance to become a vital and healthy plant.
Reply:All you need to do is take the part of the vine that you want to regrow and sit it in a glass of non salty water in a window and it will start to grow roots and then when their mature enough you can repot them, I've started alot that way ask my husband.
Reply:do u want to keep the old plant or just make a new one ????

you cut a root off and plant it it should work just nicely