the little red and black plastic bits are called pole connectors.
I was told to get them from maplins by adept (they were useless at maplins)
Best bet is a model hobby shop there's one in leytonstone (east london) they do mail order.
sorry i'm sure this post is way too late but only got on net recently, bought a laptop 3 weeks ago

basically if it's connectors on trolley i
GENTLY pulled red/blk connector towards so wire hangs out you get a few inches slack; then prise them off with small screw driver (broke them off) being carefull of metal contacts inside!. probably a better way but i was worried about dismantling trolley.
It's easy enough i'm useless at diy
hope this helps mate
thanks lee.
P.s i'l look later for name of model shop for you. plastic red/blk bits £2 ish as i remember.
had to replace twice now, need to do on charger now
