You believe in OIT (aka Out of India theory of Aryan migrations)?
I used to believe that Aryans could possibly have originated in Southern-Central Asia, i.e just above Kashmir. Now I even don’t believe that, as Dravidians are actually Central Asians, possibly of Near Eastern origin. Aryans are way up the globe, somewhere around Russian Steppes. It is impossible to pin point exact location. They are subsumed among us.
The Indo-Aryan Homeland is in the area where northwestern Kazakhstan meets southwestern Russia near the southern end of the Urals close to Baskkoria and the Tatar Republic. I had a map of it that I had drawn for this site a while back. They were up there around 4,500 YBP probably. Between 4,500 BP and 3,500 BP, they moved south, eventually occupying the Indus River Valley. We can actually follow their migration every step of the way and yes, On the way down, they settled in Uzbekistan, Turkmenistan, Tajikistan, (here one arm, Indo-Iranian, branches off over to Iran and Afghanistan) and the Chitral up in the Northwest Territories of Pakistan over and across Gilgit and the north of Pakistani Punjab and Pakistani Kashmir to the Indus River Valley into Punjab, Kashmir, etc. where they settled. A number of these people along the way – the Tajiks, many Pakistanis, and the northwest Indians are all heavily Aryan. Uzbekistan and Turkmenistan are also heavily Aryan although the Aryan is heavily mixed with Mongol.
BMAC was one of the areas where they lived on the way down.