86 Indy 400 coolant syatem

I am replacing the small clear coolant lines which have deteriorated and seem to have an extra one. The one from the reservoir to the radiator cap is clear but there is another one near the pull start near the larger black 2" line that I'm not sure where it goes (maybe a tee to the first one?) Any help would be greatly appreciated. Thanks, Dave

86 Indy 400 coolant syatem