Thanks for all your help, sorted Did as SM25T suggested with blunt item to stretch grommet then fed through easily, had to remove grommet from transmission tunnel to do so, was fun to put back in but all good. Fitted a USB C socket while in fuse box cover area as existing 12V socket with an adapter wasn't charging phone. Gave myself a proper fright, got arm stuck between exhaust manifold & bodywork while feeding wires through for what felt like an age, managed to free it with a few cuts n bruises, was a bit like it's OK don't panic, don't panic, HELP PANIC!!! All's well that ends well