How to convert courses and hours (from a non-european university) to ECTS?
If you're getting a degree in Argentina, then you should be concerned about the eligibility/mapping of the actual degree, not on the ECTS of individual courses.

ECTS of individual courses would apply if you want to get a degree in EU but have some of your earlier courses of an unfinished degree to count towards that new degree;  However, if you want to continue studies in, say, a masters programme then you'd enroll based on your Licentiate degree as whole, and none of the courses would be spearately treated.

In any case, if you need 'proper ECTS conversion', then you'll most likely need an official statement about that from the institution giving you the degree, not anyone else.