I recently changed the speakers in my 4104, and the hardest thing for me was ordering the correct speaker! Had to wait while the one I got (an 8ohm V30) was swapped for the one I needed (a 16ohm V30). My own daft fault. :(
The connectors were push fit, but soldering them shouldn't be tricky. IMO wiring a guitar's pickups is more complicated. Just remember where all the wires go (make a sketch maybe?), and you should be fine.