GPU related question

[PRIME686]

Hi I just bought a EVGA GTX 960 4GB FTW Edition and I'm only using two connections, My question is this, The rubber grommets for the connections can they be left on the connections I'm not using or is it wise to remove them 

[Altecice]

Leave them on, they stop stuff getting in the outputs

[Enderman]

its fine to leave them on

[PRIME686]

What about heat dissipation 

[James1989]

What about heat dissipation 

There would be no effect on heat dissipation, it's just covering output.  You don't have a blower style card which if I'm right exhausts air out the back.