Suburban rear seats: wrapped/attached the seat belt straps around the bottom seat frame tube.
I have not yet tried to kludge a seat belt attachment location for the Suburban front passengers. I'll probably drill through the floor and use a floor mount for driver and middle front passenger?
I doubt that a practical/safe seat-belt configuration can be found for the jump seat?
If I had a panel truck, I'd use sturdy floor mounts.
Maybe someone has installed shoulder strap/belt for the Panel driver?
A Panel passenger seat belt would be a little more difficult?