Wires through bulkhead
There's a grommeted hole on the outboard kick panels. On some models it's used for power windows and such.
I used this on my old (non SMB) van to bring antenna wire and 12V power inside. On the drivers side, it's located behind the plastic cover where the hood release is. You can also see it from the outside when the driver door is opened and you look by the hinges.
As an alternative, you could come up through the floor under the drivers plastic foot well. The foot well unscrews easily and pops out. You can make a hole, inset a grommet, run your wires and silicone the remaining hole space.
2005 Ford E-350 Diesel Sportsmobile
EB 102 Voyager top, 3.55 rear, Mobil 1 all around
270 amp alternator, billet water pump, coolant filter kit,
aluminum radiator, X-Monitor with pyro, trans temp, boost
+ Scan Gauge & SCT Live Wire (Economy)