How does a slot weld differ from a plug weld?

Overview of plug and slot welds, their uses, symbology and application

My question is, would I be able to plug weld or slot weld the 78 tube in with a stickarc welder? Reason I ask, is that I have only ever

plug weld vs slot weld Plug, slot, and spot weld; J-groove weld; Flare-bevel groove weld; Bevel-groove weld Edge Joint Welding The metal surfaces are joined together

plug slot For speed and strength, at least in thicker material, stop the tab at the mid point thickness of the slot and fill with a hot plug weld In 3mm