1.3.2.1 Slot Name

Select the Holo of the gear in the Outliner and then focus on the Details panel. Under Settings > Basic, you will also find the menu item "Slot Name". If you recall, this entry refers to the value defined during the conversion step as the "Slot Name".

If the Slot Name matches both for the Part and the Holo, the component will automatically snap into the corresponding slot when approaching, triggering the subsequent assembly event.

When converting using the Transformer, both elements are purposefully assigned the same Slot Name.