I used this a few years ago and it worked out really well. It appears to have only gone up $4 since I bought it. I used the black for a common, the red and white for hot feeds (two branches) and the green for the accessory feed.
https://www.amazon.com/dp/B003...b_fed_asin_title_0_0
You can check the Monoprice website as well.
I used aviation connectors as interfaces.
https://www.amazon.com/dp/B075..._b_fed_asin_title_18
John