I use a premade hose from genos with a schrader fitting on one end that goes on the VP44 and the sender I put a ziptie on it, and then a 3/4 hose clamp to keep it from sliding off, and then another ziptie to hold it onto (whatever is convienent).
Make a note, when going thru the firewall, I pulled the grommet for the main wire harness, then found out you cant reattach it, but the plastic piece the grommet is attached to pops right out from inside real easy. don't make the same mistake, the cab noise is now 30% higher.