Looking for the reserve fuel line on a STX1100
 

Hi,
I'm installing a primer kit and I've got everything going but cutting into the gas line. The instructions call out cutting into the reserve line but I'm not sure which one it is.

Does anyone know? There are 3 lines coming from a cover on the gas tank. One goes to the carbs. One looks like a return line from the carbs. The last one goes up to somewhere behind the dash. Is this the reserve line?

I appreciate your help.

Thanks,
James