How to: Easy, Precision Stacking of BESTÅ Cabinets - IKEA Hackers
Per Besta instructions, it says to connect another unit by screwing them into holes 3 and 7. Any idea why these? Can I use other holes? Doesn't seem uniform like this. :
User manual Ikea BESTÅ (English - 28 pages)
IKEA BESTA ADAL AA-316674-7 user manual : Free Download, Borrow, and Streaming : Internet Archive