How to define a slot in a template when using render function?

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LEGO Slot Car Race Using Scalextric SLot Car body with LEGO bricks added runnin on

lego frost slot I made a working LEGO slot machine!! PuzzLEGO•179K views · 12:41 · Go to 8:33 · Go

lego slot Most of the modern sets have this part with slot These bricks are not differentiated by LEGO, and the slot is an unintended result of the