Past winners for the Slovenian youth league is not added. I made a list of top 3 by season if you wish to add them:
Year:1st(id), 2nd(id), 3rd(id)
22/23: Ilirija (5777059), Olimpija (1639), Maribor (1629)
21/22: Domžale (128652), Triglav (1641), Koper (1632)
20/21: Domžale (128652), Olimpija (1639), Maribor (1629)
19/20: Olimpija (1639), Domžale (128652), Mura (1630)
18/19: Domžale (128652), Maribor (1629), Olimpija (1639)
17/18: Maribor (1629), Domžale (128652), Bravo (64000753)
16/17: Triglav (1641), Bravo (64000753), Domžale (128652)
15/16: Domžale (128652), Bravo (64000753), Koper (1632)
14/15: Domžale (128652), Gorica (1627), Interblock (7580059)
13/14: Domžale (128652), Maribor (1629), Koper (1632)
12/13: Gorica (1627), Maribor (1629), Olimpija (1639)
11/12: Gorica (1627), Olimpija (1639), Domžale (128652)
10/11: Maribor (1629), Domžale (128652), Celje (1637)
09/10: Maribor (1629), Gorica (1627), Domžale (128652)
08/09: Interblock (7580059), Aluminij (5410642), Domžale (128652)
07/08: Maribor (1629), Domžale (128652), Celje (1637)
06/07: Koper (1632), Maribor (1629), Domžale (128652)
05/06: Gorica (1627), Maribor (1629), Triglav (1641)
04/05: Gorica (1627), Maribor (1629), Koper (1632)
03/04: Maribor (1629), Koper (1632), Gorica (1627)
02/03: Maribor (1629), Gorica (1627), Celje (1637)
01/02: Olimpija (1639), Celje (1637), Triglav (1641)
00/01: Rudar Velenje (1638), Interblock (7580059), Triglav (1641)
99/00: Mura (1630)
98/99: Olimpija (1639)
97/98: Maribor (1629)
96/97: Triglav (1641)
95/96: Olimpija (1639)
94/95: Mura (1630)
93/94: Mura (1630)
92/93: Olimpija (1639)
91/92: Slovan (7580943)
90/91: Slovan (7580943)
https://en.wikipedia.org/wiki/Slovenian_Junior_League
https://www.nzs.si/tekmovanja/default.asp?action=lestvica&id_menu=338&id_sezone=2023