can't locate setoolkit configuration for sendmail

I type in the foolowing on command line

setoolkit
1 (Social Engineering Attacks)
1 (Spear-Phising Attack Vectors)

and get the following on screen

The Spearphishing module allows you to specially craft email messages and send
them to a large (or small) number of people with attached fileformat malicious
payloads. If you want to spoof your email address, be sure "Sendmail" is in-
stalled (apt-get install sendmail) and change the config/set_config SENDMAIL=OFF
flag to SENDMAIL=ON.

I have toiled hard to locate configuration file for setoolkit but can't. I searched on Internet and all the searches regarding this are for backtrack and not kali. Kindly help me resolve editing config file for setoolkit

thanks everyone for viewing this thread. I got the directory :

usr/share/set