[Mobile-Portable] Coax entry point into new RAM 1500 Quad cab?

[Ray, W4BYG]

Bought a new RAM 1500 Quad cab pickup to tow my travel trailer with and 
am having difficulty finding path into the truck for the antenna coax.   
It has a great place in the console to locate the control head of my 
FT100D.   But I've not yet found a way to get the coax in.

Previously, I've been able to gently snake the coax in under the 
hatchback door of my Toyota 4Runner with no significant deformation of 
the cable.  However that is not available of the new truck and the doors 
on it fit so tightly there isn't enough clearance to snake a cable over 
any door seal without pinching it badly.

Has anyone come up with a good way to get the coax into a similar vehicle?

  I would like to mount the main body of the radio(s) under the driver's 
side, rear passenger seat.  There is a convenient compartment there.

This will be my 7th HF mobile installation over the years, but I'm a bit 
stumped.  Your suggestions will be appreciated.
Ray, W4BYG

-- I'm no longer young enough to know everything!