Alternators

It looks like you need to repair the butchered up wiring on your car before you replace the alternator. Your alternator has the two B+ terminals same as some Ford alternators did. There is supposed to be two wires, usually in parallel going to those terminals. Someone has tried to run one wire off both terminals with a horrendously bad hack job.
D+ is the European marking for the field positive wire or power for an internal regulator, sometimes coming from a warning light.
You need to find someone to help you with repairing the wiring. A Lucas LRA607 will do a good job if wired properly.