Engine Felpro Intake Gasket Leaking Near Firewall

Installed a new felpro gasket set on the intake manifold, while adding water to the engine. Noticed running out from the # 8 bolt, but looking into it it I noticed I missed the a bolt on the back end of the head...this bolts holds on to nothing. But water continues to flow out when I just add water to the system. Question is should I take manifold off, just to install the bolt to hold down the gasket or just cut this end of the gasket off. Thinking of going to the dealer and get the OEM O'rings that it came with the manifold. Let me know what anyone has done to correct this issue. Think I think its a Dorman manifold, not a stock intake??
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