JEEP LIBERTY DRIVETRAIN

One End Is At­tached In Pic And The Other Is Just Hang­ing With The Plas­tic Thingy In The End. What Is This, Where Does It Go?

I Just Re­placed Trans­mis­sion And In­stalled A Used One With 39,000 Miles. The Car Shifts Twice Only And Revs Go Up To 3,000-3,500rpms With­out...