In the inscription describing a war with Melid (Militia) a land Musha is mentioned.
On the same day I set off towards the land, on the right(?) I subdued the land Qala’a. I came to the land Karniši, mountainious land on the left(?) of the city Miliṭia, and I came to the land Muša nearby the city Zabša.
The land was in most likelihood near modern Malatya and Kiği ( Armenian K'eli>Keghi from Urartian Qala'a?).
In Urartian inscriptions it was frequent when the final vowel was not really pronounced. So here we have a land Mush which fits well in the theory that the term Mushki was the plural of Mush. While the extra -ki represents the Armenian plural suffix -k' frequently used in many toponyms in Armenian period.
Nevertheless it is very unlikely that this place was the initial homeland of Mushki because in Hittite period the region near Malatya is well attested and there is no any term that can be linked with Mush/Mushki. Summing all data available we can say that Mushki came to that region after 1200bc from a more North Eastern location.
Some of them moved further west and settled in Anatolian lowlands around modern Kayseri (ancient Mazhak) Eusebius use the term Moschoi to denote Cappadocians. While in Iron Age the term Mushki was also used to denote Phrygia.
The Turkish archaeologist Veli Sevin linked the Early Iron Age grooved ware in Malatya Elyazig region with Mushkis.
Let's hope one day we will see EIA ancient DNA associated with grooved ware.