Use SYSUIF.INSTALL_FILE to register the external language script and install the script on all nodes.
The SYSUIF.INSTALL_FILE external stored procedure has this definition:
SYSUIF.INSTALL_FILE( IN uif_name VARCHAR(128)NOT CASESPECIFIC CHARACTER SET UNICODE, IN uif_filename VARCHAR(256) CASESPECIFIC CHARACTER SET UNICODE, IN locspec VARCHAR(1024)CASESPECIFIC CHARACTER SET UNICODE, );