Cyanogenmod 12.1 - SM-T520 - missing install zip in Recovery

Downloaded the Cyanogen Recovery and CyanogenMode from: download.cyanogenmod.org/?device=picassowifi
I have followed instructions from: wiki.cyanogenmod.org/w/Install_CM_for_picassowifi
I loaded the recovery partition as follows:

Code:

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# heimdall flash --RECOVERY cm-12.1-20150824-NIGHTLY-picassowifi-recovery.img --no-reboot
Heimdall v1.4.1
[.....]
Initialising connection...
Detecting device...
Claiming interface...
Attempt failed. Detaching driver...
Claiming interface again...
Setting up interface...

Initialising protocol...
Protocol initialisation successful.

Beginning session...

Some devices may take up to 2 minutes to respond.
Please be patient!

Session begun.

Downloading device's PIT file...
PIT file download successful.

Uploading RECOVERY
100%
RECOVERY upload successful

Ending session...
Releasing device interface...
Re-attaching kernel driver...

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Straight from there I started the Cyanogen Recovery but I'm stuck as I don't have the install zip option there.
The only thing I have got on my screen under the Cyanogen Recovery logo:
Reboot system now
Apply update
Wipe date/factory reset
Wipe cache partition
Wipe media
Reboot to bootloader
Power down
View recovery logs

Any suggestions?