holes in the base of the VP 763 under the Bubble Paddle reservoir are
used to attach the Bubble Paddle system to the FXALP-FM. This
system has the advantage of being used with accessories that do not
have an SBS Microplate foot print feature on the bottom.
You can use the V&P FXALP-FM with an
existing Beckman ALP Base if you have an extra one or you
can purchase an ALPFXBASE