Modern paper air filter box

The dry filter system including air cleaner box has been obtained fro YaHoo Auction at 2,000 yen. This modern shrunk paper air filter system should be tried as an experiment instead of oil bath old designed one for the convenience of maintenance.

Thanks to the information from the Web site I could know the way of hoses connection, especially hot air inlet control vacuum hose for the actuator equipped on the fresh air inlet way and 15mm nipple toward right side.

The former question was cleared by connecting with the closed nipple for retarding the idling ignition timing, the rate of vacuum is reduced according to throttle valve opening gradually. This linear transition of vacuum control could activate the actuator controlling butterfly dividing the fresh and cold air with hot air from #3 cylinder after cooling.

The latter problem of 15mm diameter nipple positioning at lower part of box to right side was prepared for vapor fuel gasoline from canister that was for later models, as for '71 model not designing setting of canister.

Naturally I could not find the way for the hose connections. The nipple should be closed for my Beetle.
Anyway the experimental trial must be performed actually obtaining the conclusion by myself.