I been using these set up for my high power system. Now I'm making it available to order to the length you need.
I make from 6" up to 24" with selicone 10G wire.
Here is the nice features about the Y-Hardness.
It come with 2 x 63V 180uF capacitors built-in.
Complete EC5 connector for your batteries and ESC.
Note: This item are make to order to length you. Give few days to ship.