Kenwood DAB HU - Clarification on Aerial sil' vous plait.

Got an aftermarket Kenwood single din, fitted, working lovely with a sticky window DAB aerial.

Stone put a massive crack in the windscreen yesterday so is being replaced.

Sticky aerial looks fugly anyway, so figured good incentive to ditch it.

From having a search it seems the original aerial is amplified, but only if connected to the original headunit (assume it sends voltage up the aerial connector)?

So if I buy this I assume it'll work as the original aerial will be essentially passive?

I assume the power lead on that inline amp can be connected to the blue 'remote' lead coming from the HU for power, as I don't have any amps (for speakers) installed.

As always, thanks for any input.