Why did you strip the wires? and yes it still connects the same reguardless of the matching wires

the filter is doing the cleaning and I would go with the color code grn to grn red to red keep the tip and ring correct try to remember snow on the trees(white/green) and ornaments(red ring) I hope that was easy to understand

as far as the pbx end I wouldent use the silver satin its a stranded wire I would crimp a modplug onto the end of some cross connect wire and then to the nttu but you way should work ok