I have a vacuum hose missing from my EF's Climate Control Box (the one with the two twisty knobs),
It is for the heater as when I turn the knob to heat, I hear a hissing sound (of the hose sucking in air), and the car blows barely any heat.

This is where the air is being sucked in from and this is another connector which has a missing hose but it was inactive in my testing of it (didn't blow or suck using various settings).

Does anyone know what hose is missing or whats going on there as I don't really want to remove the whole dash again for one little hose.

Also is there anywhere in the service manual that shows the vacuum hose connections like the wiring circuit section?

Is the noise under the dash or on the other side of the firewall

that vac line goes to the heat box, should be a hard black line going down the back of the dash, can find the heater box end bu removing the glove box