The Crystal Focus Saber Core looks quite complicated at first, but basically a relatively simple wiring is possible.
You require:

• Batterypack
• High Power LED
• A momentary switch or slide switch to turn on/off (e.g.: Conrad.de item number: 700479 - 62)
• A pushbutton as auxiliary button (kurz: aux)
• A switch as "Killswitch"

If one uses a Luxeon 5W, two 3,7V Lithium Ion Batteries are best, in the usage of Luxeon 3W or Seoul P4 Z-LED four 1,2V Ni-Mh batteries are recommended (see: High Power LEDs for CFSC) Der Scha High Power LEDs for CFSC) The switch, used as killswitch is used to completely shut the saber off or on. I.e. it cuts the current supply. The momentary or switch for switching the saber on/off just turns into standby mode, but there is still some low current that will empty the batteries after a long period of idling.
The momentary swith as auxiliary button is used to navigate through the menu or to activate special effects like blaster deflection or force push.

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At first glance is may seems quite complicated but when imaging everything without some electric circuits, it becomes relatively simple.

LED - Led-Plus to L+; Led-Minus to L-
Speaker - Does not matter which poles are used.

Now just the switches and the power supply are left:
Between the positive pole of the battery pack and the positiv pole of the board a switch, which serves as a killswitch, must be soldered.
One contact of the on/off-switch respectively momentary switch must be soldered at the soldering pad of the Activation Switch/ Button the other one between the positiv pole of the battery pack and the negative pole of the board. One side of the auxiliary button has to be soldered at the "Aux"-soldering-pad", the other one at the negative wire.