Help Please, TPC Motor Mounts Issue (LS Swap)

[MotoRider42HC]

I am ready to install my Texas Performance Concepts motor mounts, but there aren't any markings on them designating Driver or Passenger side.

One is an L shape, and the other is a Square shape.

Which one goes to which side?

Does the direction of the L-shape matter? L ways or 7 ways?

Edit: SOLVED, see below:

"
Driver is long, the bracket goes with the long extension on the driver side, on the bottom.
"

Thanks to Kent at TPC who also sent me some PDF instruction booklets.