Retrocultmods wii guitar world tour

I’m trying to get it to work, he said the start/select could be the problem but I’ve tried switching them. One half of the connector came off bc my iron was too hot, is there anyway to save this?

I’m trying to get it to work, he said the start/select could be the problem but I’ve tried switching them. One half of the connector came off bc my iron was too hot, is there anyway to save this?