It's not as difficult as you might think, slide the 1st jig up the line 12-18" and tie it off however you prefer, then slide then 2nd jig on the line and tie it off. As a general rule the 12-18" of space between the jigs and the weight will keep 'em from tangleing, but it can happen. The 12-18" can be adjusted +/- depending on your preference/fishing conditions, what the fish want, etc. Then just make a normal cast while the boat is moving, and let out line accordingly. I don't use a weight on the end of the line except for the weight of the jig. I may or may not add a small split shot weight above the jigs if I need to get deeper in the water column if I only have one jig tied on and I want to get deeper to see if the fish are there before re-tying that rod with 2 jigs since I would just cut the one jig off and then rety that jig up higher and add the 2nd jig.
GO BIG ORANGE !
I meant to behave, but there were just way too many other options available at the time.