From Nakatsugawa St. to Magome-juku

Where is exactly the bus stop for the bus to Magome-juku from Nakatsugawa? GoogleMap doest show the exact location of the bus stop near Nakatsugawa Station. And how would I know that it is right bus?

I am quite certain someone at the station can answer than question for once you get to Nakatsugawa Station.

And how would I know that it is right bus?
It is a small station, and there are not going to be many buses. The bus stop has a sign, also in English. You won't miss it.
https://ja.wikipedia.org/wiki/%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Kit...
https://www.japanvisitor.com/japan-city-guides/nakatsugawa-guide

There is a tourist information office on the left as you leave the station and as has been noted the bus stops have information in English. I believe you need stop 3. Here is a link to Streetview https://bit.ly/2EG8ox0