Correct install position AP MR76 with antenna

[RG]

Hi everyone!

I'm installing MR74 access points using antennas omnidirectional (MA-ANT-20) in a warehouse, I'would like to know what is the correct position for better coverage: 

opc 1 : Antennas and access points vertical 
opc 2 : antennas and access points horizontal 

[KarstenI]

These antennas are typically installed in a way that they point up and down:

https://meraki.cisco.com/product-collateral/dual-band-omni-antennas-4-7-dbi-datasheet/?file

But in a warehouse, the narrow patch antenna is often a better fit (but with a different AP):

https://meraki.cisco.com/lib/pdf/meraki_datasheet_MA-ANT-3-F.pdf

[RG]

Thank @KarstenI

I've installed the antennas as you mention and the network are working fine with very good signal