Looking for someone who knows how to run power cables from a minivan's battery through a grommet in the van's firewall and into the cabin. The cables will power an inverter behind the front seats. Our portable Bluetti power station will be plugged into the inverter for fast charging while driving. Our portable refrigerator will always be plugged into the Bluetti for camping. We have a convertible bed in the minivan and will be touring national and state parks this summer.