The Owner's manual was very helpful. The WEGA is about 35 years old and needed repair.
Your Website is pretty good und easily to handle.
Text excerpt from page 2 (click to view)
Installing the Tower onto the Floor Stand
STEP 1 â€“ When using the tower as a surround speaker,
set Toggle Switch in tower cup to â€śFull Range.â€ťWhen using as a front channel,set Toggle Switch in tower cup in bottom to the â€śFull Rangeâ€ťposition.Please consult the Prelude MTS Subwoofer manual for exceptions to this setting.
STEP 3 â€“ Insert double-ended Audio Banana Plug into tower
STEP 2 â€“ Screw alignment pins into cup in bottom of tower.
Use two per tower. Screw threaded ends into holes and tighten until snug.DO NOT overtighten.
STEP 4 â€“ To add greater stability to the tower stand,add
sand (not included) in the plastic bag provided in the tower base. Turn the base upside-down and remove the (3) 1/4-20 Phillips screws holding the foot onto the base.