Does Installing Access Boards Upside Down Really Matter?

This tech is wiring/installing Mercury Security boards in what looks like an Altronix or maybe Life-Safety Power enclosure. It isn't pre-wired like ProWire or Altronix Trove2:

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** *** ****, **** **** *** this *** ******:

* *** **** * **** ***** Mercury ****** ****** ****... **** ** really ******???

** **** ** **; ** *****'* matter - ********** **** **** **** fine. (* ** *** **** ****** are ******** ****** ****, ******.)

*******, *** ******* ** *** ****** cables ********** ** *** ***** **** be ********* ** **** ***** **** up, ** ******** *** ******/******** ****** could ****** ***** ***** ** ** too ***** ****** **** *** **** hung ****** ****.

**** ** *** ***? **** ** matter ** ***** ****** *** ********* upside ****?

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** ***** *** ********* **** *** wrong *********

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** **... **** ***** ***** ******** on *** ***** ** *** ***'* tighten *** *** ** *** *******

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******* ******** ******!

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*** **** *** ********

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** **** ** *** **** ** the *******/******* ** **********, * **** "it *****'* ******." ******** **** ** how *'* ******* *****. * ****** having *** ** ***** *** ***** loop ** *** ****** ** *** board. **** ***** **** ** ******* dressed ** **** *** *** *** bottom **********.

** * ********** ** **** ******* has * ********, ** **** *** standard.

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***** **** ** *** *** ***** offs *** ******* ** *** *********

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**** *** ********* ** ****** ****?

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