kfirestone

I'm New Here
I ordered the DL-01SS Cabin Heat Vent from Van's instead of the aluminum one and Van's did not send any installation instructions. It is a box with 3 two inch openings. The one with the valve connects to the firewall, but requires a firewall penetration to install the cable. Any installation ideas on how to make the cable pull to open the valve and push to close? I'm thinking some kind of bracket to reverse the cable action?

Thanks,
Ken
RV-7A
TMX IO-360 M1B