Gather these parts.  They will be glued stacked in order (top to bottom and left to right)

Start with the bottom of the stack. The items in the right column in the first image stack as show in the image directly above. Make sure the large holes match up.

Glue the bottom 2 plates in the left column of the first image on top of the previous stack.

Locate 2 of the jars included in this kit.

Insert the 2 jars into the holes in the stack and then glue the final plate from the first image on to lock the jars in place.

Glue the caps and support rails onto the top of the jars and the notches in the plate from the previous step.

Glue in the gauge stand to the 2 holes on the base plate.