The low side a/c port is located behind the right front fender liner.
it is under the passenger side headlight facing towards the wheel
Ford usually place them in the passenger side footwell just in front of the door behind a plastic cover. It could be different in the Focus though as I've not worked on one.
In a 2003 Ford Focus : The engine coolant reservoir is on the passenger side of the engine compartment ( it has a thread on pressure cap )
On my Focus it is inside the fender liner of the right front wheel.
it is located in front of the coolant reservoir
Low pressure port located on the larger hose from the compressor I think most trying to add know to use the low side but was looking for where it is located
The low side service port is on the suction side (larger hose) and the high side service port is on the discharge hose (smaller hose)......
the r134 rec harging port on a ford focus is just in front of the passenger side front wheel, you have to remove the plastic inner wheel well to get at it, once you remove it, you will see the silver canister with the port on top of it!!!!
The low side ac port should be on the side of the passenger side of the firewall. It is mounted under the battery harness.
Under the right front fender spray skirt.
On the suction side only if you are just using a do it yourself kit........ The low side service port is on the suction side (larger hose) and the high side service port is on the discharge hose (smaller hose)......