The only information that we have had about the RS-26 deployment so far is a report quoting an unnamed source that said that the first regiment will be deployed in Irkutsk. Now there is a piece in VPK News that says that RS-26 will also be deployed with the 7th Guards Missile Division based in Vypolzovo. This source doesn't struck me as reliable, but it's an interesting data point.
UPDATE: It doesn't look like there is any activity in Vypolzovo that would suggest that the division expects deployment of any new missiles. Unlike Irkutsk, neither of the two regiments of the Vypolzovo division shows any signs of construction.