The best process to split a payment in Sports Connect would be for your league to leave the order as an open balance. That way, the parent can then pay using multiple cards and choosing the amount to pay on each card.
This process begins with the league choosing to leave the registration as an open balance during the registration process.
Process for the parents
log in >> begin the registration >> answer all questions related to the registration >> STOP when they get to the payment section >> reach out the league to finish it.
After this, your league can pick up where the parent left off. Within the registration process for the league admin, they will see a checkbox to not have to input CC info and complete the registration with a full open balance.