GO:0061349

The series of molecular signals initiated by binding of a Wnt protein to a receptor on the surface of the target cell where activated receptors signal via downstream effectors including C-Jun N-terminal kinase (JNK) to modulate cytoskeletal elements and control cell polarity that contributes to the shaping of the cardiac right atrium. [GOC:dph, GOC:mtg_heart, PMID:19056682]