Its a bit confusing when you first look at that mess of hoses but if you strip it away and trace the hoses and think for a while, you can work it out.
You will find the fuel return comes from the fuel reg at the front of the rail, it also has a little vaccuum hose to the reg part on top.
The fuel feed is to the other end of the fuel rail, you cant miss it.
There is a large vaccuum port at either end of the throttles. Delete the front one with the right length of bolt and a sealing washer, then connect the rear facing one to the brake booster via a one way valve to keep the vaccuum to the booster.
The throttle rest again has a small pressure reg that must be reconnected or it will idle high, also the vapour purge solenoid is under there, but Id just relocate it to the body somewhere and run hoses to the manifold and the charcoal cannister.
Then it looks tidy as and you save a couple of kgs of weight. you can fit a plastic charcoal cannister from a later model car, like a mazda or a kia, which is removable on a slide bracket and is way lighter. They also bolt in on a single 10mm bolt so you can locate it more rearward to help with weight distribution, and bin the ugly old fashioned oversized ke charcoal can.
There is a medium sized vaccuum hose on to of the itb manifold that should go to the map sensor, as it gives a nice balance of the vaccuum on all the ports.
There is also an idle control valve under the fuel feed, which you can just leave there, as it defaults to half open. Best practice would be to connect it, but its 4 wires and would be a pain compared to most of them to control id say. Apparently a ford icv is easier and only 2 wires? Perhaps connect one of those. It really just allows the right amount of air to enter the motor once the throttle are shut to maintain a good low and innofensive idle. I quickly got used to mine idling at 1600 revs. A good idea might be to put a little filter on it so it cant suck dirty air into your ports. I never did that, but I will when the motor goes into another car.
There is a top cover vent on the back of the head, Id suggest connecting that and the dipstick to a catch can that breathes through a filter to the atmosphere. That way it cant suck dirty air, and you have no dodgy places to pump out oil if you roll the car. i had a cams legal 2 litre can that i bought from repco and mounted where the charcoal cannister used tio live.
Hope this helps!
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