AC 16/80 junction box

[SX Cobra]

I'm trying to piece together a 1937 16/80 Competition but I'm currently stuck on the positioning of the indicator and horn junction box near the bottom of the steering column.  I understand it should be mounted on a small bracket somewhere between the front cross member and chassis side rail but I can't find the bracket, nor exactly where it should be held.  I wonder if someone could possibly post a picture of the bracket and how/where it's mounted?
   Many thanks
   Mark