My complete kit (delivered mid-Oct. 2020) came with two mechanical as well as two no-load LED flashers without ground pigtails (as shown above). I agree it is strange your kit came with the pigtails, and so did Edwardb's on two different kits/orders placed years apart.

I have two no-load LED flashers with ground pigtails on order. All of my testing has been with the kit supplied no-load LED flashers. Since I'm having no other electrical issues (yet!) associated with the very dim LED behavior, I'm hoping the new flashers will solve my issue.