:welcome: @The Exterminator.
So I am guessing your profession involves the removal of 8 legged creepy crawlies?
Yep, That's the one. Been in the industry since I was in high school working during school holidays.
Redarc has one but it is exactly the same but costs more...
Not a bad idea about the LED. It also has a 'beep' which would need to be audible.
Perhaps instal with velcro and a quick connect for the wires then remove when not towing?
How loud is the "beep"? That's not a bad idea either with the Velcro. Quick, lets get onto production of remote head units like the Redarc RHBC.