If the line from the charcoal canister is present and missing its connection at the opposite end, and the solenoid nipple is broken off of your manifold, you should be able to find another loose vacuum hose with a solenoid attached to it... and possibly a vacuum nipple broken off in the hose... There's an electrical connection to it as well, so unless you're throwing ECU codes for it being missing, you're right... it should be in there somewhere.