I did this for my ITR, what's your opinion?
2m of Norauto 10mm section battery cable and 6 Norauto gold plated terminals for 10mm section cables (17 euros in total).
I replaced the two engine ground cables and connected directly the battery ground cable to one of the engine ground cables.
For me this is the best solution instead of connecting a spaghetti mess of cables everywhere in the engine bay or buying a more expensive ground stabilizer.