Ford E450 Class C Dash Emergency Battery Switch issues

[beemerburner]

Hello all,
2005 Ford E450 Class C, Fleetwood Jamboree. Two switches by left knee; Emergency start battery switch to join engine and house batteries & Generator Start switch. NEITHER ONE IS OPERATIONAL.

Have checked all fuses; all OK.
Did not find Battery controller solenoid where shown on Youtube videos; Underneath/behind radiator overflow bottle on driver's side engine compartment.

Looked at house battery area and found battery separator, 1 controller that clicks on when ign key turned on.

An emergency batt controller solenoid is supposed to "click" when the dash switch is pushed; we here no clicking from anything, anywhere when the batt dash switch is activated.

We see that there is a PURPLE wire that is not attached to anything.

QUESTION: Does anyone have a similar setup and could you tell us where YOUR purple wire attaches?

Thank you for your time and consideration.

https://www.dropbox.com/s/aqc2hvcuavnh2ap/DSC03529.JPG?dl=0
(purple wire sticking straight up w/ eyelet at end.

https://www.dropbox.com/s/h50sjduuneipzvx/DSC03530.JPG?dl=0
(batt compartment at steps.

[bobndot]

See if this helps. Pics.

https://www.irv2.com/forums/f120/aux-start-solenoid-wiring-320755.html

[enblethen]

Need to add for you o contact Fleetwood for wiring diagrams. Some are available on line. You need the coach serial numbers and exact model number.

[enblethen]

I see a severely damaged yellow wire in first photo.
Where does the purple wire go?