You can apply to the M2 QLMN on the official website of Paris-Saclay-University (see links below). You’ll need several documents prepared:

Motivation letter
Curriculum Vitae
All transcripts of the years/semesters validated since the high school diploma at the date of application
Supporting documents (TOEFL, TOEIC, certificate of a teacher …) of a level of a foreign language

Additional supporting documents:

Letter of recommendation or internship evaluation
VAP file (required for all persons requesting a valuation of the assets to enter the diploma)