The reason is you normaly have the "hot" wire as the insulated female, on yours the solenoid is fed on the black wire and then grounded to the bars via the yellow red whilst the later ones are fed power from the start button and grounded via the green/ red and starter safety system.
The proper fix is to fit an insulated female to the solenoid wire but you could make a female/female jump lead.
Connectors can be got on ebay just dont use the red or blue insulated car type ones!