I apologize the blueprint is a bit crude, but this should give you an idea of what to make with my description of an anode design.
The wire from the hook, to the anode is one long wire. 10 gauge wire is ideal.
*For others that are reading this with a translation program, the following typed below, is what is written on the paper with a little more description.*
Start with a 2ft.-3ft. Section of 10 gauge solid awg wire. Strip a small bit of insulation on one side and create a hook/loop, this end will be attached to the power supply (This is the image on top right of the blueprint.).
On the other end of the wire, remove 4in. - 5in. of insulation and make an L.
Using the L side of your wire section: Suspend the bottom part of the L (horizontal part) in the middle of your mold. You want the wire to be centered in the mold. Completely centered in the x-axis, y-axis, and z-axis. It should not be touching the mold. This is the solid black line on the blueprint with the dashed line box around the bottom part (Image on bottom left of blueprint.).
You will then proceed to pour your molten silver into the mold, completely covering the copper wire evenly on all sides (This is represented by the dashed line box, that is surrounding the solid line in the bottom left image of the blueprint.).
Once the silver has solidified, you will now have an ingot with the copper wire trapped in the middle. You have just made a silver anode that will connect directly to your power supply with no breaks in the connection. This design cuts out contact points (terminal points) that will add unnecessary resistance, and potential failure points.
Edit* Grammar, and added a description of blueprint for people using translation programs.