# Ender 3 Max v4.2.7 + BLTouch - What wiring expected by pre-built firmware?

**URL:** <https://marlin.crc.id.au/forum/t/ender-3-max-v4-2-7-bltouch-what-wiring-expected-by-pre-built-firmware/506>\
**Category:** Support\
**Tags:** bltouch\
**Created:** [24 December 2021 16:41 UTC](https://marlin.crc.id.au/forum/t/ender-3-max-v4-2-7-bltouch-what-wiring-expected-by-pre-built-firmware/506 "2021-12-24T16:41:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![maiello00](https://marlin.crc.id.au/forum/letter_avatar_proxy/v4/letter/m/e19b73/32.png) [@maiello00](https://marlin.crc.id.au/forum/u/maiello00)\
**Post date:** [24 December 2021 16:41 UTC](https://marlin.crc.id.au/forum/t/ender-3-max-v4-2-7-bltouch-what-wiring-expected-by-pre-built-firmware/506/1 "2021-12-24T16:41:54Z")

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Hi,  
I would like to use the pre-built beta Ender 3 Max v4.2.7 + BLTouch firmware, but I am not sure which configuration it expects for the Z-stop pins. Should they be in the 5-pin port, or plugged in separately with using the z-stop port?  
Also, is it possible to download the config files used for the nightly build? I would actually prefer to build the firmware locally on my machine - but I haven’t been able to find any config files for the E3Max v4.2.7 board combination.  
Thanks, and happy holidays  
Mike

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**Author:** ![CRCinAU](https://marlin.crc.id.au/forum/user_avatar/marlin.crc.id.au/crcinau/32/1337_2.png) [@CRCinAU](https://marlin.crc.id.au/forum/u/CRCinAU)\
**Post date:** [28 December 2021 00:02 UTC](https://marlin.crc.id.au/forum/t/ender-3-max-v4-2-7-bltouch-what-wiring-expected-by-pre-built-firmware/506/2 "2021-12-28T00:02:30Z")

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We always use the probe port for the BLTouch in the daily builds.