1999 with a 5.4.

Some hoses and/or tubes have been scavenged from the engine and I'm having a hard time figuring out what they are. On the driver's side there's a port that goes into the air intake just before the throttle body, and a hose near the back that looks like it goes to the IAC. I think perhaps these connect together? Should there be some kind of tube or nipple that connects on the intake side?

On the passenger side the PCV valve is missing, and there's a tube that looks like a hose should connect coming around from behind the engine ending near the heater hoses. Also I'm the same area coming from the I take after the throttle body is another nipple pointing at the battery. 2 more hoses connect on either side of it. I'm not sure if this is vacuum related to the PCV, or perhaps coolant?

Finally back on the driver's side there's a vacuum line coming off a solenoid just above the brake booster. The vacuum line is broken from melting but I can't see where it would connect.

Hopefully the pictures help

 

I believe I've finally found the missing parts. The tube for the IAC is commonly called an "air bypass hose" but usually just described as "tube assembly" in parts catalogues. F75Z9H308ED

The stuff on the passenger side is definitely PCV and apparently some configurations use a heated PCV which is where the 3rd connection is coming from just after the throttle body. XL3Z6C324EA

Still unsure where the other vacuum line connects, mostly just want to find it because it may be a vacuum leak.