Nah, don't do that. If I read you right, you have an Al/Cu connection; you want connectors Listed for Al/Cu. Not hard to find - I think even HD sells them.

IMO, you have two decent options:

1. Ideal #65 "Purple" wire nuts. They're UL approved for AL/CU connections and contain an anti-corrosive liquid. You can find a site or two on the net claiming they have been associated with fires, but you should consider whether these claims are mostly just hyping a much more expensive specialized "solution" (i.e., COPALUM high-pressure crimping).

2. AlumiConn connectors. These are reasonably small plastic-housed bars with independent lugs to accept wires of different metals. (The copper and aluminum wires don't actually touch each other.)

I own a farmhouse in Maine that was wired in 1966 with all aluminum wire and have spent the better part of 15 years replacing the small guage AL with copper. I'm about 75% done and there are a couple of circuits I may never completely replace due to the difficulties involved in rewiring.

Anyway, I've used both methods--purple wire nuts and Alumiconn connectors--with no problems. The purples are widely available (e.g., Home Depot) whereas I've bought Alumiconns at an electrical supply house. Going forward, I have a slight preference for the Alumiconns.

In your case, it sounds like you'd only need two or three (about $4 as I recall for the purples) so I'd definitely go for a UL-approved method rather than loading up a regular wire nut with "goose-$h1t" (as the grease is so affectionately called).

If you go with Alumiconns, make sure you torque them down properly.

Thanks, guys.

Local HD didn't have em---never heard of them. Fortunately, local Lowes did.