venting budd boxx 4x4x6.5 euro hood ?s.

I just bought the 4x4x6.5 bud box off the internet. Loving it. I also have a euro hood from htg inline cooling hood with a 6 inch duct fan. However the tent only has 3 ports and i wanna run a speperate system to cool for the light as well as exhaust and charcoal filter, that is 4 vents. I have thot up some suggestions, but i cud use some advice . Another angle or somebody to scream dont cut ur tent, or u have to, everybody knows that lol. This my first grow and only one plant to flower. Temps in high 80s to mid to low with the light off. Passive intake now, pulling hot air thru light, 400 hps.