My bathroom faucet/showerhead holder is coming off of bathroom sink that is behind the toto.

hye4tab

May I plz get some help?  I have a problem with faucet/showerhead holder   The holder unit came off...there is nothing holding it in its place.  When I lifted the unit, it appears to have 2 empty screw holes underneath but I don't see any lose screws...has any one seen this problem and possibly know how to secure down the holder/faucet back on the sink?  Currently, if I place the showerhead in the hole, the whole thing will just lift and fall forward down into the sink as nothing is holding it down.  Any idea?  Thank you in advance for your help!