We can provide custom cables for powering cameras and accessories through the Helix 2 pin power port(s). Any cables we currently offer are available in the Helix accessories category at https://anamorphix.com. If you don’t see the cable you need, please contact us for a quote on building one.
Many of our customers also utilize http://mediablackout.net/ for custom cable needs. We have no affiliation with them but they do come highly recommended by our Helix customers.