You're fairly new here, we don't know your skill level. Rate yourself from 1-10 where 1 is "injures self with screwdriver between tool chest and bike" and 10 is "rebuilds engines through the exhaust pipe like a gynecologist." But really, using decent components and tools, it's not a big deal. Particularly if you do one wire at a time and be patient. I have a marginal view of Croatia from the outside from an in law, but not sure what your ability to procure this type of goods is. He mostly talks about how much better the cheese is there than here. And the Ajvar, and I have to agree on that one.