Lower Door Jam Wiring routing access ?

Looking to send wiring from my fuse box located near drivers left foot all the way into the bed of the truck. I have removed the plastic lower door sills in both the driver side doors and I do see other wiring there.
For some reason I cant pass wire through the post between the 2 doors on the driver side, I an using a small rigid fish tape but it feels like it hitting a wall. Is there a truck to get the wire to pass through this area , also once I get it into the back seat lower door jamb , Id like to pass it through the lower rear corner where the rubber access plug is , but having the same problem when I try to start from outside the truck through the rubber plug area.

has anyone else done this , any recommendations?

 

Would you not be better suited going from the engine bay than the kick panel fuses?

 

Ok by removing the plastic cover which is on the post between front and back doors (to the left of the drivers seat) I was able to fish my wires from my fuse box area to the back seat area within the door sill. My next challenge is getting the wires out from the 3/4" access hole of the cab , I am trying to fish a cable through but its not showing up in the door sill area, i was hoping not to remove the rear seat and side panels.
Has anyone fished wires through this hole with success