I'm a professional engineer, and have a lot of experience of vehicle electrics, from simple stuff like this to full EFI builds and installs.
These are made with automotive grade thinwall cable, crimped and soldered. Inline 15amp fuse at the battery connection. And dual 20amp micro relays.
Long lead to the battery is 1.6m, long enough to run alongside the stock wiring loom. Leads from relays are 160mm. Allowing the relays to be fixed behind the clocks.
£45 posted in the UK
