Switched ignition live feed

[Donny_Dog]

I've noted about 3 things (gauges mainly) using scotch locks from the cigarette lighter wire!
Sad thing is, I need to add other things into a similar feed, but want to do it correctly.
What is the best way to either share 1 connection with 3 devices safely? do I have to run individual feeds?
Something like this? Not seen any on any UK websites, but my searching has been poor.
How have you done it?

 

[Dec_NE]

Personally if you're using the cigarette lighter feed for things which are reasonably high loads, I would run a half decent gauge cable from the battery terminal into a relay - use the lighter feed as your 'switch' on the relay and then on the output of the relay, have a set of terminal blocks or something like that to distribute the power