Yes, 60 watts is about ideal for the Dean's Ultra connectors. You also need to have as massive a tip as you can get, no small round tips, go with the big chisel tip with flat ends. You want to have a tip that holds the heat (won't cool off as soon as it touches a cooler object). The secret to a good joint is first to clean, clean ,clean the area to be soldered. This may require a wipe or two with a fine sandpaper or crocus cloth followed by a wipe with alcohol. Next, use a good flux on both the wire and the connector. Tin both the wire and connector. Physically hold the tinned wire and connector together (use a jig to hold them in place). Now just heat the area where the two touch, you may not need any more solder although it won't hurt if you have a bit of molten solder on the iron tip as you heat the junction. As soon as you see the solder flow, get the heat off the junction and let it cool a second or two before removing from the jig. You now have a perfect soldered joint.