First of all, the amount has to be over $600. If not, you would not issue a 1099-Misc.
Second, you have to treat them as two distinct businesses, despite the fact that you own both. If you would sent that 1099-Misc to any other business you would have worked for, then you have to treat your business the same way.
If you acted in the capacity of contract labor for the LLC, then the LLC owes the SP a 1099-Misc.
