E30 Zone

I've just bought an m52b28 for my e30 and when looking around it I noticed there is a hell of a lot of vaccum hoses that have been cut on it... Does anyone know of a diagram or something I can use to identify each hose?

Also my heater hoses have been cut... Can I just use the e30 heater hoses or do I have to source replacements?

Thanks
Callum