Hi if there's not enough left of the wire to comfortably rejoin them then you can splice in a small length of extra wire or just run new wire from start to finish, If it's quite thin speaker wire it should be fine as the original wires are small because they need to fit in a small space. Leave steam along Thomas for last as that is the most complex, The others can get fiddly but go back together easy enough.
if you get stuck we are here to help ok
if you get stuck we are here to help ok