There are THREE (3) different things you need:
1. Service Code (posted above) . This one lets identogo know its for "firearms application"
2. ORI Number (this is the NJ agency number). Your NJSP contact should give that to you to enter
3. Contributing Case Number. There are suggestions out there about what to put in there. But your processing agency (NJSP) should direct you as thats how they supposedly finds / tracks YOUR fingerprinting.
I am going to be getting a gun belt, specfically a brown and black leather belt. I already have a 511 belt from work that I could use for carry. As for clothing, I plan on using the same clothes I own. My pants run a size big on me so that should help me with inside the waistband carry.