Hi,
BR* must be installed in the database nodes (regardless if you have a 3 tier or 2 tier, RAC or sinle instance, EXADATA or ODA or other thing).
it is as easy as that.
you can find information on the following notes:
1627541 - BR*Tools support for Oracle ASM and Exadata/ODA
However, the prerequisite for this is that a remote shell connection or a secure shell connection without a password was set up between the database nodes and from the "oracle" to the "<sid>adm" OS user, and that the BR*Tools are installed on all nodes.
1598594 - BR*Tools configuration for Oracle installation using user "oracle"
and any of the 3 documents explaining how to use SAP netweaver with Exadata:
SAP NetWeaver and Oracle Exadata Database Machine (page 11)
Using SAP NetWeaver with the Oracle Exadata Database Machine: A Best Practices Guide (page 6)
Using SAP NetWeaver with Oracle Database 12c on Oracle Exadata (page 17)