Sorry to contradict the previous answers but if you want to strictly compliant with the SVR4 and Solaris standards don't use /usr/sbin, /usr/local/bin or /usr/local/scripts or "anywhere" which all violate them.
The whole /usr tree belong to the OS so you shouldn't put your files here.
The recommended location would be: /opt/<your package name>/[bin] or possibly /opt/local/bin if you have no package name to provide.
Should your script need some configuration files, you would put them in /etc/opt/<package> and should your scripts want to write log files, they should go in /var/opt/<package>.
Of course, nobody is going to sue you if you don't follow these standards but you might be in trouble if one day the OS decides to remove, overwrite or forbids you to write to a file/directory you wrongly though was suitable ...
Solaris standards are described in some of the 5th manual pages.
"man filesystem" on a Solaris machine describes the one related to the file system layout.
On systems I support but do not control I put then in /usr/scripts/bin.
On systems I own I create a directory off of root and put everything in there, like:
/application_name/bin (scripts go here)
/application_name/etc
/application_name/rc.d
/application_name/log
..etc...