There is no conclusive evidence connecting the Kachwahas of Amber with Kachchhapaghatas of Gwalior except nominal similarity in names, there is no evidence at all of Dhola Rai having a Kshatriya origin.
Amber of Kachwahas was once a “third grade” & “obscure” state, it rose to prominence only because it was the first to seek Mughal protection and enter into matrimonial relations with Mughals which provided this small principality varied opportunities.
Later on these very Kachwahas of amber went across India to fight Odias, Marathas, Ahoms even fellow Rajputs like Maharana Pratap to bulldoze them for their Islamic masters.