Alternator Woes... Please Help

[lsfeder]

Hi everyone,
So the alternator failed in my W124, (I know its the alternator b.c I took it to an electromechanic who strapped it to one of those bench testers).
Anyhoo, they had an alternator in stock available by Gamma Electronics. Fit the car perfectly, so I went for it. Upon installation, we discovered the connector was not the same as OEM, in fact it was very different. It had a bolt connector for the + terminals and a mini connector for the bat charge light in the dash. Basically the mechanic told me he would connect the two large cables from the cars harness together, solder them, and strap them to the bolt via a clamp connector, and the little wire was solderd to the mini connector.
The alternator IS charging the car properly now, however all the dash lights on the left side do not light up. The batt light illuminates VERY dimly (you have to squint to see it) when key is in pos 1, but goes out when the engine is on.
So what do I do to get the dash lights functioning again... did we cross wires stupidly? Is this type of connection bad for the W124?