I only remember 4 bolts for the green bracket on the driver side: one in the front, two down below and one way back low between the block and firewall. The tube is for the cam cover breather hose. Just reconnect it when you put the bracket back on.
Don't be tempted to leave the brackets off as they are there for a very good reason. Without them, an oblique head-on crash (common) will shear off your fuel system and spray your hot engine with fuel. Bad juju.
Mitch