This is now a VERY time consuming process by doing it manually and could be an automated feature.

I like to bring back this idea reffering to thread https://forum.solidworks.com/message/405827#405827

1.  Conventional Tab and Slot                                             :  Tab located on a free edge of the part  ( the one being discussed ).

2.  Unconventional  Tab and Slot                                        :  Tab located  along a bent edge by creating a relief.

This function should have  the capability of  creating the features across parts in an assembly or

within a part between multibodies . Multiple edges across various parts should be possible in one go. Over projection

Slot clearance Edge location distances and pitch between tabs or quantity of tabs must be  the inputs. Self evidently

the width of tab as well.

Also cutouts for excess laser material on the sides of the Tab should be a input value