I take it that you want the splitter to get a link off and replace with the link pin so as to make the chain the right length and join it together again?
Of you're not too heavy handed, use a grinder and carefully grind away the head of the pins until flush with the link. Then use a knackered old Philips screwdriver or preferably a punch and tap out the pins. Rejoin chain with the split link part, clip back together 👍 simples !!