The company has 'plugged into' the international market. [=the company has become connected to the international market; the company has begun to do business in the international market]
His friends are 'plugged into' the city's music scene. [=his friends are actively involved in the city's music scene]
The computer program will take data from these sources and automatically 'plug' it 'into' the equation.
(..) You ridiculously stupid morons. - No, it's her. - It's her. You idiot! Better keep my electric grid up and running, or I'll plug your head into it! Clarissa! Hey! Jackson? What are you doing here? We got swallowed up, just like you. Nice ship. My dad's got tons of this stuff (..)2013 Percy Jackson: Sea of Monsters
(..) I'm handing you the deal of the century on a fucking platter! What do I get out of it? Easy.. I got a million a month negative carrier I got bosses trying to pull the plug, because they're thinking I'm out of my fucking mind Alright? We make this trade, those problems aren't so big anymore (..)2015 The Big Short
(..) All I can think of is they must've wanted the alien for their weapons division. He's been protecting it right along. Parker, will you plug it in? - I don't know why... - Because he may know how to kill it. Ash, can you hear me? Ash? Yes, I can hear you. (..)1979 Alien