Any kiwi plant experts out there?

I have neglected and overgrown 8 year old kiwi plants that have never have been given a proper pruning. It is now a huge mess. 2 female plants and 3 male plants.

See here: https://www.flickr.com/photos/48774809@N07/52663844801/in/dateposted-public/

What should I do to tame this beast and stimulate it to generate lots of fruit. How and where do I start?

I’m thinking that I need to pretty much cut it way back to the scaffold branched (I think that they’re called “cordons”) and start over.

Thanks.