Looking at it more - i think there might not be a gsm aerial for non sim 5f units, as the bluetooth option relies on phones own gsm signal. This is back of non-sim 5f unit
Which means you'd probably need to add this amp in d pillar -
https://www.ebay.co.uk/itm/112234783319
and run cable from roof antenna to this amp and then to 5f unit.
I think all roof antennas have the gsm connector
