How to access devices with static IPs on different subnet than router?

How to access devices with static IPs on different subnet than router?

I have a SonicWall TZ100, firmware SonicOS Enhanced 5.8.1.13, with a
static subnet of 10.0.6.0/24 on X0. Ports X2-X4 are port shielded to X0.
On ports X3 and X4 I have two devices that were moved from different
locations and we forgot to update their settings while on site. Their IPs
are 192.168.213.254 and 10.0.4.253. I'm not sure which one is connected to
which port.
What do I have to do on the SonicWall to gain access to the web interfaces
of those devices so I can change their IPs? I don't have physical access
to the devices which is why I'm trying to do this remotely.
I tried assigning the X3 and X4 ports with static IPs of what the gateways
for those devices should be, but it didn't help so I reverted it back.
Help would be appreciated.