Bnc caps for my Ds2072a

[Emi]

Hi .. i know its a bit  question but should i plug something into all unused Rigol bnc inputs  to obtain better dust and  emi protection ?
I know there's a lot of bnc caps around but some are 50/75 ohm, others has shorted pin to gnd  and again others are simply dust covers but not in short..
What is better for ch inputs, ext trigger and trigger out?


 

[BravoV]

https://goo.gl/tZMGv5

[Gary350z]

Look here:
https://www.eevblog.com/forum/testgear/how-do-you-keep-your-bnc-malefemale-clean-on-your-test-equipemnt/