The 'E' Type Forum

Hi, does anyone know what the circular hole next to the heater hole is in the bulkhead of my RHD Series1 2+2 ?
It is covered by a square plate with a pop rivet in each corner. The fifth hole is for one of the heater box mountings and has the captive nut on the inside.
Photo attached.
Steve

Hi
Possibly for the steering column on a lhd build? Or, as on my 3.8, for the brake bellows assembly.