I have some challenges to figure out what I need to do in order to get GK 6.2 or higher software to my cabinet

I used to setup and mess with GK machines but that was 20 years ago and now days I'm totally lost. I managed to purchase
a used IGT Trimlime single screen cabinet with Persian princess game (I haven't powered it on yet).
I have gathered following info:
CPU card is: Game King Enhanced - CTL - 757044
CPU flash card is: Game King deluxe - memory 2 with GKB00025 chip.
How should I proceed, what is needed and best place to get it?
Kr,
Heikka