Cheat Engine

[FadedPigeon47]

Hello, like a month ago i made a simple infinite ammo script for a game, and now i would like to activate it directly with a internal dll hack written on c++ i have made simple value changes with c++ before but now i want to do this.
this is my script:
newmem:
mov [rbx+000001E8], #99 {rbx+000001E8 = All characters ammo}
code:
sub eax,[rbx+000001E8]
jmp return
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considering that there are 50+ characters in the game and rbx+000001E8 points to all of them, i can only make ONE pointer for each character ammo
i also have tried making a pointer to rbx and adding 1E8 to it but it just crashes the game