I'm about to do an engine conversion with a Honda b16 or B18 into a mini, as part of this I'm looking to use a SiR EG6 speedo,

I want to now what feed into this and from where

I'd like to keep the mini loom and splice the Honda ECU and engine loom into it,

Is this possible or will I need some of the body loom to make it work ?

Or does the ECU connect to the body loom and has nothing to do with the engine loom

If anyone has any wiring diagrams then I'd love to see some also

Thanks