Auto Trans cooling lines install

[ZXTC]

Hi All

Anyone done this? Any tips?

My car au s1 wagon trans seemed to overheat today. Would stall when any gear selected.
Had a look and appears the cooling lines just loop to each other on the radiator and not to the trans but can't seem to see any external cooler.
To dark to see what is happening on the trans side.
I suspect previous owner removed the external cooler before sale.

Thanks Mick