@ joframe sorry you post looks as its been hijacked by bickering. As you stated you have 1.5mm which will do exactly what you need it to if you can follow the cable back to where it was first joined ( the last fitting) that's always best practice as there is less chance of faults with fewer joints in the cable. If not I would use a permanent push fit connection which your local wholesaler will show what they stock which will suit the purpose it is needed for.