future fin box placement for a 7'2 big guy board...any recomendations

i need to put the future fin boxes in before i glass and being that i’m not too good at this yet and i really don’t want to mess up the ride on this board… i was hoping someone could help me out mayb with some pictures or ideas… it’s a 7’2 big guy board… i have it thick and it’s a diamond tail… dont’ ask i just thought it’d be fun to ride… now i was debating a single fin but i changed my mind and decided to go with a thruster but i’ve never used fin boxes before or tried more than a single fin, only glass on and i’m not sure about the angle of the side bites should my boxes be angled towards the rails or should the be paralel to the center fin…?..eh? i’m not worried about glassing the boxes i know what i’m doing when it comes to that…thanks i really appreciate any help you guys can offer…

~mahalo & peace~

~Z