Led lights wired in parallel, should be series. How to resolve?

[Toplad]

Hi

Have little issue

Some Led lights have been wired incorrectly, instead of series the connection, it's connected in parallel. The supplied transformer/driver is 350ma constant and connected in series the lights are pulling 3v each. There are 9 lights in total and are set and can not be accessed.
I was thinking that if install a resistor in series between the driver and the first light this limit the power consumption and stop the led melting, not sure of the correct way to work it out?????
I can only access the cable at the driver end btw, everything else is concealed

Any ideas

 

[jackhammerJIM]

what sort of lights are they and why can't you access the terminations to alter the connections ?

 

[amlu]

you can try replacing the supplied driver with something like a 24v DC power supply wired into one of those:
CC CV 90W Step Up Boost Adjustable Constant Current DIY Power Supply 9-34V #A56 | eBay

and its output going into the leds.

set the unit to minimum current/voltage and start adjusting into higher values till you get some reasonable light,