Hello, I'm almost sure you will not get any sort of ever-working manual here...
Allow me to quote here: "Are the results of roulette spins really random?
Yes, they are. In the free roulette games in our database, the result of each game round is determined by a random number generator (RNG), which randomly selects a winning number. When it comes to roulette in brick-and-mortar casinos or in live dealer casinos, the results are determined by a spinning roulette wheel and ball. The number on which the ball lands is the winning number, and it is random."