Hello. My name is XXXXX XXXXX I will be glad to assist.
If all 4 connectors are the same, I would say they are for the injectors.
For your missing hose concern, Does it attach to a plastic nipple on the intake manifold?? It may be the tube for the EVAP purge solenoid.
Only if you can upload it into your reply. I can send you a wiring diagram and you can match the wire color and number of wires to each connector.
Are all the components in your car missing any connectors?? Sensors that are not hooked up. The length of the wiring harness will determine all the sensors that will be in reach of the harness. Look for anything not connected.
Now I understand. I thought you meant 4 electrical connectors.
The 1 big vacuum fitting goes to the brake booster.
The small vacuum fitting goes to EGR valve position switch.
The PCV hose that attaches to the valve cover should go to the other big fitting.
Here is a diagram of the vacuum hose and EVAP hose location.
#4 in this diagram is the purge solenoid. There should be two plastic lines on it. One of them goes to the throttle body and one goes to the rear of the car(charcoal canister.)
The hose/plastic tube you are missing, goes from the purge solenoid to the intake manifold.
Sorry I couldn't get back to you sooner. I have a family and one of my daughters had a school program tonight.
Ok. The other two ports are vacuum. One goes to the vacuum power brake booster. The other port supplies vacuum to the EGR valve position solenoid (EVP). Here is a diagram of the EVP solenoid.
Your other coolant passage on the intake should connect the the left over coolant hose.
The rubber hose with 4 small plastic lines coming out is what connects to #8. It is supply vacuum to solenoids. There should be one that connects to the brake booster hose and one that connects to the valve cover PCV hose.