It is a modification of the Insert leg RF-LR S.stl that can hold the power switch versus the insert at the bottom of the leg.
!! Flip the model to it prints face down.
You can edit the model for free on OnShape if you want - https://cad.onshape.com/documents/2a51684967dd7cb26da76957/w/b71fcdb30ee5e15504fd1a2b/e/26ccc862be005b1732dbd099?renderMode=0&uiState=65b7f34f8b23c62edc9efd58
The author remixed this model.
Add a hole to accept the power switch.