YAMAHA 90hp flushing kit

[Bushrider]

Hi ,
I found on the US Yamaha site that there are 2 flushing kits used for the 90hp 2 stroke engine .
One has a connector directly on the side cover of the exhaust system and the other one suppose to be somewhere underneath the bottom cowling .
Does somebody has this options on his engine ??
On the slipway I do not have fresh water and I intend to carry a 30l canister in the car and want to flush the engine ( not running ) with the help of a 12V water pump .
Does that makes sense ?

Cheers Jürgen !