Marlin 1.1.4 with two end stops possible?

Hello All

I have a Tarantula printer and want to use besides the standard Z end stop an additional sensor (captive NPN type LJC12A3-4-Z / BX for glass).
Is it possible to leave the end stop switch in the ZMIN slot and add the sensor in the ZMAX slot? If yes, how do I program Marlin with the correct settings (see attachmend)?

Ps: I looked at Toms youtube movie, but there was nothing mentioned about leaving or keeping the original Z end stop switch.

Thanks.

Jan