Installing new dash wire harness in 67 dart

Dumb *** question time! I'm installing a new dash wire harness in my 67 Dart and I decided to replace the ignition switch since I'm in there. I got a new one from Laysons buttttt, the new one has an extra terminal for a ground. Will this cause any issues with the new harness? (New harness is from Year One, so it's OEM style and doesn't have a ground connection for the switch) Hamms is pointing to the original