I followed the plans and used the firesleeve as directed in plans. I did buy a slightly larger size than provided to get a better wrap around the outside.
Prop cable through upper / left opening and throttle / mixture through the other one. I carefully bundled wires and cables and used silicone wrap tape to help reduce chafing on either side of firewall, as well as nylon wrap for wire bundles on the cabin side of firewall.
If I ever have to replace a control cable, I'll use a separate pass-through.