Newbie confused by install instructions

Hello,

First apologies for such a basic question. I have no php so understand little of the plug-in syntax
I have registered the plugin and done the twitter stuff it returns a piece of code. I can see the ID and my user name embedded in that code.

What I don’t understand is where I put the line
minitwitter id=”xx-number-xxx” username=”@username”]
in the php code
or alternatively which line in the code I should modify to insert the number and UID.

I see something about the template should I install the Twitter script there?

As you see I am very confused and am sure there is a simple answer

Regards
Roger

https://www.ads-software.com/plugins/mini-twitter-feed/