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