I do not know for sure what the Dutch called the native soldiers in their ranks. In general during the colonial Era there were three main castes in the Dutch East Indies the first being the Dutch and other Europeans, then the "foreign Orientals" which consisted of mainly Chinese traders, and finally the native Indonesians which were called Pribumi (loose translation: inlanders).
Also sorry, I didn't really answer your question at all. I could ask my MIL, but I'm almost certain she wouldn't remember as it was so long ago and there are a lot of bitter memories concerning the end of dutch rule there.
The KNIL's recruitment tactics in the Dutch colonies was the classification of certain people who were somehow better suited to serve in the army. In the Dutch East Indies, Ambonese and Manadonese, with the addition of some Alifuru and Timorese, were deemed fit for the army. Together, they are often referred to as Amboinezen.