355 Firewall diagram

Can anyone provide a diagram of the rear firewall for a 99 355F1? I need to identify a corroded port from which a rubber hose has become disconnected. I believe it leads to the heater core but am unsure.

 

A diagram? Can you mark the approximate location on this photo:

https://www.dropbox.com/t/04sO33tMgsgPyrBE

Sorry, not an F1.

 

The black rubber hose attaches to the "port" which is part of the large diameter metal pipe (?) which runs horizontal almost entire width of engine compartment. There are two pipes running horizontal; this port is part of the upper pipe. The port is about 3 inches to the left of center of compartment behind 4 braided hoses. I believe that antifreeze runs through the hose but am not certain. On the dropbox picture, the port is exactly where the disconnected hose appears on the upper horizontal "pipe" (?).

 

Here are two pics of the F1 firewall. Hopefully it helps.

Image Unavailable, Please Login Image Unavailable, Please Login

 

This Eurospares diagram may help:

https://www.eurospares.co.uk/parts/ferrari/355-52-motronic/cooling-heating/cooling-system-nourice-41069

The smaller connection on that upper pipe appears to go to the coolant reservoir and the larger pipe seems to go to the water pump.

The upper crosspipe part number is #158249

 

Image Unavailable, Please Login I believe this shows the nipple and connection as Ian described

 

Post a picture, or a better description of the hose in question. Someone here can tell you right off the bat.

Hoses running to the front are

Two power steering hoses about 1/2 inch
Two hoses to and from the heater core about 18nn. One going to the coolant tank, one runs to the water pump. These connect to aluminum pipes so it is hard to imagine them corroded
Two hard brake lines 1/4 inch
Two hard AC lines 18mm

All run over the fuel tank