Marsiling Tunnel DIY exploring

From the info gathered from the internet I roughly knew the location of the tunnel - bounded by the Admiralty West and Marsiling Crescent. But where is the exact entrance ?  I took the South approach as NHB map hinted there is no public access from the north marked point. 

 With the recent tour conducted by NHB just a day ago the weeds/grass should be well trampled and sure would provide a give away. Or was it? 
 

Some one provided a GPS location and i google-mapped it with the Green allow next to A

  Result Round #1 ...I  hvnt found the half burried tunnel yet..but the entrance should be correct as several sealed tunnels were there..

Marsiling Crescent  - a casual glance wont tell you which way to enter the forest.  Mid-right is the entry point.

The tell-tale sign is here.. see how the grass were trampled a day before....

Note  the Yellow and Black Marker ... bingo this should be the entrance

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NHB guided tour video. From extracted  frame you can match this versus the one i took on the background. Look at the lichen and scratches pattern.

WIth no marking on these sealed wall you will have to use the lichen pattern, scratches to ID them which work very well. See image above matching which wall to the video still frame.

THis is the North Entrance!!!  look at the video screen capture on the top left

Notice the small hole at the base of the sealed wall.

I zoomed in the little hole probably dug out to let the  internal water to flow out

After walking westward along the painted green pipe line  for a while you can exit the pipe line to the Admiralty West  overlooking the Strait of Johore