How Do You Make Attachments to Your Units?

I want to a guy with a cool gun model I found

Go to Object Editor, the Abilities tab, search for "Sphere" (Ctrl+F), set "Art - Target" to your custom model weapon, delete the Art - Missile Art, the Art - Target Attachment Point1/2/3" and go to "Art - Target attachment Point 1" and "Add string" = "left", press ok, and then "Add string" again, placing "right"/"left", up to which hand you want the model attached to. Then, Art - Target attachments, delete "3" and set it to "1". Add the ability to your unit and all set. Don't forget it's a unit ability!

Use these tutorials:
https://www.hiveworkshop.com/forums...o-attach-a-model-or-an-effect-to-a-unit-7314/
https://www.hiveworkshop.com/forums...llready-have-weapons-without-modelling-59356/

Pharaoh has got it right, but I figured I would add this link because it has a nice list of other attachment points you can use.

Note: I prefer to use weapon when attaching weapon (obviously ), instead of taking the time to figure out left hand, right hand, meh (I can be very lazy).