You must have solid wire from A to B by code...and safety. Just when you think "It'll be fine...I spliced them together really well and taped the heck out of them"...the lights flicker and you smell smoke. Not safe.
What kind of access do you have to the wires? You can place the junction box anywhere that there is access...ie attic, basement ceiling...etc. Or pull new ones through and fix any holes.
[URL]http://www.meyerrenovations.com[/URL] Beware of the "do-it-all contractor".