I answered your email. Here is some tips on soldering small connections with small wire that works for me.
A trick to soldering to the small 30 guage wire is use a wet sponge. You strip the wire carefully and then heat some solder onto the sponge. Make sure the solder is in small beads. Now while the solder is on the sponge you just touch the solder bead to the wire while the soldering iron is touching it to and it will bead up on the wire without melting the wire insulation or getting so hot that the solder will not stick. Now you can just touch the solder bead on the wire to the small contacts in the camera or where ever and your done. It should stick perfectly.