Chinese android car audio with 4g antenna main vs div

[Rey G]

I purchased a Chinese head unit with 4g lte capabilities and it came with a 4g antenna and a sim card slot cable, well I know where to plug the sim card slot cable but forthe antenna there is two options to plug in one is the 4g main and the other one is 4g div. Anyone knows which one I should use?

 

[Rey G]

Never mind I figured it out.

 

[Mpgrimm2]

Never mind I figured it out.

Please clarify for other's that may need to know if they try out that or similar radio.