Help with a TFI wire on a 5.0HO conversion

[lodnirgs]

I have been using Ryan's schematics to rework a 90 Mustang HO harness. There is a Red/blue stripped wire that connects to the TFI plug at the distributor and stops at the coupling to the Mustang's main underdash harness. On Fordfuelinjection.com, Ryan's schematic show this wire to go to start only. What is "start only"? Other schematics do not show this wire!!
Please help. Thank you Lodnirgs

 

[bert]

I rerouted that wire to my solenoid. Hooked it up on the starter side. It will supply battery voltage to the wire when the engine is cranking only.