Mod Podge your silhouette to the inside of the jar. Mod Podge drys clear and not instantly, so you can take a little time to position the images the way you want them. 
Paint the exterior with Mod Podge and cover it with tissue paper. You want it as flat as possible on the glass and not overlapping where your image is, but wrinkles are more then ok. I think it looks better with wrinkles and creases. Do not put tissue in the upper part of the jar where the lid screws on if you want to use the lid.

Let it dry pushing down any bubbles that may appear. Be Careful when touching it however wet tissue paper tears easily. Creases look better then tears.

When it is dry enough you can handle it without tearing the tissue, paint another coat of Mod Podge and sprinkle it with the Crystal Glitter. When it's dry add some decorations to the outside of the jar so it looks good when it's not lit. Use one of the little battery operated tea candles to lite it up. I would not recommend using a real candle, there's paper inside the jar.