Need some help soldering Binding posts.

The Cardas hole makes it tricky. It does not take much solder and you need to see the strands of wire that have been tinned in a small trough of solder. I've done it 2 ways,take off binding post copper nuts, put drop of solder in front of hole and another small drop across hole towards the cavity. I've done it between 700 and 850 degrees. Soon as solder starts to melt hit the tinned wire for split second then then put it all together fast.  Other way is to clip off or cut(Dremel) the hole and your left with cavity with easy access. When you melt solder is more a timed thing than a visual thing. Can't see solder it just disappears and bubble gums. If you can slide washer on wire it can also give access to more metal to heat up, I never did it that way.

Do you have to solder or can you just loop the internal wire to the Cardas posts?

@garthb309 -

     The best way I can imagine, to make that work, would be to use an extra nut on each post, to securely capture your wire and guarantee a connection.

     IF your posts didn’t come with 2 nuts per (AND I remember correctly); 8mm-1.00, jam nuts are what you’d need.

     Were I going to pursue that idea; if needed, I’d confirm the size/pitch, before buying anything online.  Most hardware stores have gauges/sizing boards available, if you don’t have a way of determining the specs, for yourself.

      Hard as these nuts are to find: brass or copper would still be the preferred material,