srx5400 HA cluster and dual SPC

Hi,

I've got two srx5400, each with two SPC cards in a HA cluster.

I am aware srx5400 can have only one RE so only control port 0 (em0) can be used.

All of dual control link configuration references are for srx5600/5800 when two REs are present - when both HA control  port 1 and 0 on the SPC are used.

But what about dual control port 0, from each of the two SPCs?

So currently i've got:

control-ports {
fpc 1 port 0;
fpc 4 port 0;
}

Can i have this?

control-ports {

fpc 0 port 0;
fpc 1 port 0;

fpc 3 port 0;
fpc 4 port 0;
}

Also to note, the FPC0 SPC which isn't connected to its counterpart on the other node doesn't have the HA led ON.

Any reference to documentation explaining this is welcome.

Thanks!