How do you install a siemans E0204MNL1060SU panel?
The main lug 60amp panel has only one buss bar. Lowe's says that is all you need these days. So the hot, the neutral and ground all attach to the single bus bar? I tried that per their instructions and it will not work./ I guess I do not get it! Please help. Thanks

Do not take advice from a store clerk unless they have a license for the trade they are giving advice for.

We need to know more about what this panel is for, how it is connected, etc.

Some photos would be very helpful.

After the Main Disconnect, the neutral and equipment ground are to be insulated and isolated.

I suspect this is a "subpanel", if so a separate equipment ground bar is need for the panel. They sell them there at the store.