Caravelle Step-Light LED bulbs

[Andysmee]

@Deaky ?

 

[Deaky]

286 led’s

 

[Steved55]

I've just purchased a batch of 286 LEDs to upgrade my footwell lights but unfortunately they are the PCB type - can anyone advise which contacts on the spade need scraping off please?
I tried taking two diagonals off and it put all the lights out!
Thanks