Where are the battery ventilation tubes for 1978 911 SC?

[crgm]

I just replaced the battery for my boss's 1978 Porsche 911 SC and I got an AGM H6 because I read threads where people recommended it.

Problem is, I don't know which tubes are the ventilation tubes. The last (lead-acid) battery that was in the car wasn't connected to anything.

Are these the right tubes to connect (pictures below)? One of the tubes leads to the side of the front of the car, the other splits into two and leads towards the passenger cabin.

If they are the correct tubes, they don't fit into the battery. Where could I find an adapter to fit them?

Thanks in advance, I don't know much about cars and can't find much info online about old Porsches.