Rio 2100 Suction Cup Bracket

[vogon]

After moving from Albuquerque back to NY a few months ago, I’m finally setting up my cube again. Well, I must be having a brain freeze. For the life of me, I cannot fit the suction cup bracket onto the Rio 2100 return pump. The pump itself has thin grooves on it. The bracket has thin tracks which are wider than the grooves. The tracks should easily slide into the grooves. Mine do not no matter how many times I have tried to angle them into place. No I have not been drinking heavily! S.O.S.!

Marineland 60g cube, Eco Tech MP10 wavemaker, Kessil AE 360,Trigger Crystal Sump
Tunze 3155 Osmolator, Rio 2100 return pump, CAD Lights PLS 100 skimmer