1. config.ini
To get this bridge between slack and telegram going you need to adapt a few things.
You need to make a copy of config_template.ini and rename that copy to config.ini.
Insert your API-keys into config.ini.
2. bridge.py In bridge.py you there is a variable called SLACK_CHANNEL_MATCHING. Change the channel to your own channels. The keys are slack channels, the values are telegram channels.
3. misc There are some lines in the modules that send to "pats-testing-range" which is a slack channel that i send some debugging messages to. You can comment that out, change the channel, it's not really an important thing, the bridge should work either way.