How did contact with Papuan languages influence Austronesian word order in New Guinea?

In coastal areas of New Guinea, many Austronesian languages have shifted from the typical Austronesian word order to a subject-object-verb (SOV) structure. It is widely accepted among linguists that this change occurred due to generations of contact with Papuan languages, which are predominantly SOV.1

This linguistic shift is also reflected in other grammatical features; these Austronesian languages in New Guinea have adopted the use of postpositions (e.g., "the house in") rather than the prepositions (e.g., "in the house") commonly found in other Austronesian languages.1