Thanks for all your replies. First I apologise for being on the wrong section. I’m relatively new on this site and didn’t read the right hand column before I chimed in.
My bike has no socket near the steering head area, only a socket just below the seat on the left of the bike. It’s one of the last single overhead cam models.
Not being technical I’ve opted for the advice from Bin Ridin. Because it was the easiest for me to do.
A local auto electrician has extended my sat nav lead and put an inline fuse just near the battery connecters, which he crimped onto the cable.
The current passes from the battery, through the fuse, then a small capsule (what I think is some sort of transformer. This came with the sat nav)
then terminates at a rubber waterproof socket with a supplied bung thats put in when the device is unplugged.
It was just a matter of threading it all through from the steering head area to the battery.
I hope this explains what I’ve done albeit in very basic terms.
Many thanks to,
Bmmike08, Bin Ridin, DutchBryn, majaem
Regards.....