If you need to connect your generator with 30 AMP L5-30 inlet support power to two of 20 AMP 5-20 or 5-15 cord set
This adapter can help you to solve your requirement.
Color : Yellow with lighted
Fit on the male (twist lock) side not a tight enough fit-there is a gap between the 2 socket halves.
Works as expected, no issues with functionality. The loss star is only for the feel of the adapter. It's hard to peg, but in my hands it just doesn't feel quite as stout/solid as I would like. That said, it's a simple adapter that seems like it will serve its intended purpose well.