I can't say for sure without testing, but using log_archive_dest_3 and the SERVICE parameter would require an oracle instance on your 3rd location in order to receive the archivelogs. It sounds like you already have a standby database already configured in location 2, and you mentioned you just wanted another alternate location off the primary server.
If I understand your situation clearly, why not mount a shared volume from your 3rd server, on to the primary server and point your log_archive_dest_3 there? So you end up with something like:
LOG_ARCHIVE_DEST_3 = /mnt/shared_dir_of_server3