There are 4 shortcuts in your map.
I have the codes to the map that shows how the shortcut is done. Just look at my ghost.
https://docs.google.com/document/d/1BA7G8htesJXS1dPg0nL4X1bY1DGW3ZvUy5_ahmwTMV0/...
https://docs.google.com/document/d/1Q3nb-Zs2nMSwShAXPTrzf2NGtk-AhRMn0qwKj6e8SOg/...
https://docs.google.com/document/d/1OQg5y6EB3dTbNR2RXfc_3KroiicQmea-q1GyddDZuM4/...
https://docs.google.com/document/d/19bT1PAizn7Hyqq_hlYcch_ipz_Nc1s2DIpXF6FRde_g/...