Happy Birthday to horizontal and kiwifred 
Have a great day and I hope that you can get a ride in 
                                

Well, I finished the camera install tonight and the mighty ST is all back together and ready for a test ride...
It all ended up probably easier than I thought it may have been.

As can be seen in the photos I mounted the rear camera right up under the top box.

While the Top Box/ rack/grab handles are made of cast alloy or such, I discovered the central part was actually plastic.
So, I made the decision to drill a hole through it which then enabled me to run the camera cable straight through into the under-seat compartment.
To do this I had to completely remove the top box mount but doing this resulted in a very tidy setup...

With the front camera I wanted to keep it fairly discreet, so I kept it tucked back under and to one side of the headlight.
I kept it offside as I was concerned that under extreme braking the mud guard may hit the camera if it was centrally mounted.
I was also concerned that part of the bodywork would appear in the cameras view so I spent a fair bit of time with its eventual placement
trying to keep any bodywork appearance to a bare minimum while still trying to keep the camera fairly well tucked away.

I guess I'll know how successful I was once I do any final adjustments of the cameras after a few test rides... 

There are upsides and downsides.  Many people highlighting the advantages of EV’s could be accused of confirmation bias; people highlighting the disadvantages of EV’s could also be accused of confirmation bias.

Bold, oversize font in some threads is akin to being shouted at, and is not necessary or appropriate in a debate.