Right this maybe a bit long winded but here we go,
I have a mk3 xr3i cab,
I put a rst lump in out of a fiesta,
Now the wiring,
can I just use my loom with the addition of changing some of the plugs ie the one the gearbox is different to the one on my loom,

I tried to fit the complete fiesta loom but ended up with wrong connectors behind dash and too many wires left when trying to splice into rear end of xr3i loom

Or is there some other way I have not managed to work out,
Tried to explain it best I could so sorry if it doesn't make any sense, or if you need more info let me know and I will do my best to explain in more detail
I have looked on various websites ie rsbible ect but could not really make sense of them
Thanks in advance

 

Just to add I have both complete xr3i loom and fiesta loom too to work with