The gray label Tap is not hybrid (DPH), it is designed for DPX, which is for use with a node.
The answer to if this is going to work is going to depend on the rest of your equipment. If you are using a Hopper 1/2 then its fine, as a Hybrid LNBF will run in DPX mode to serve it. But if the Hopper is either the 3 or Duo, it will be running in Hybrid/DPH mode, which means the tap may not work.
Now it may be fine, the frequencies should be similar both for MoCa and sat signal (DPX is about 950-3000mhz and DPH is 950-2150mhz iirc, while MoCa for both should be 675-850), the only problem I can think of is that one technology may have different electrical characteristics then the other, like voltages or power draw, which may or may not be a huge deal.
Another idea is temporarily running a cat5 cable from Hopper to Joey if that is even possible with your setup.
TLDR: Not a problem if you are on the Hopper 1/2, would recommend ordering a proper tap if its the Hopper 3/Duo and Wally for that matter.