There are four Klues tied to the Rampart mesa in Season 3 of Mortal Kombat 1's Invasions Mode, three of which can be accessed before taking on the season's final boss. SLAPPED TOGETHER is the second Klue that most players will come to as they make their way through the mesa and is found on the LETHAL HAHNS node.
Mortal Kombat 1: How to Complete the SLAPPED TOGETHER Klue in Season 3 of Invasions
Those looking for the SLAPPED TOGETHER Klue solution shouldn't have to search too hard, as it shares its name with one of the game's many Fatalities.