Neutral balance flywheel mods for 5.9 magnum

I have used this with good results.
Bolt on Flywheel Weight for 130t Ext. Balance 360 Magnum Mopar Dodge A833 5.9 | eBay
I also use one for my run stand flywheel- this way I can remove it when breaking in a neutral balance engine, or install it for a 5.9 Magnum.
Thanks.
Does it come with details on where to mount it? The picture in the ad is vague.