Modding the OPV, Turning 15bars to 9bars [Ariete 1389]

hey guys, lately i've been trying to dial my configuration right - weight, grinding, tamping, etc. it seems like my last resort is to actually get rid of the 15bars and make it into 9bars like it should be for good extraction. Using a disassembly video i've seen, this is how the machine looks from the inside

https://preview.redd.it/uikwhpmtggae1.png?width=1074&format=png&auto=webp&s=7fb85bee04cf52417a22b535a66dae13c3cb4d74

I can't really recognize if there is an OPV there, and if not. i'd be happy if someone can explain me through this modification. thanks guys