You can connect the Slingbox M2 to a TiVO Mini; however, since these only have HDMI ports you will need to invest in an HDMI Splitter. You can see an example of one here:
You can also purchase these in more electronics retailers, you will just need to make sure that this has an HDMI Inputs, HDMI Outputs, and Component Outputs, as well as a mention of "HDCP Bypass" or "HDCP Compliant" on the packaging.
I hope this helps!
Sling Media Technical Support