[Lmarche]

Few days ago the internal regulator/75amp/ Bosch alternator broke, it was time to replace it for a new Internal regulator/ 75 amp/ Valeo alternator.
I checked the wire connections, comparing and labeling with the previous, recheck them in a couple of posted discussions in this forum.
The double Red wire, is connected to the B+ 10mm, the multiple brown ground wires are connected to the same post opposite side B- 8mm, and the blue wire is connected to the lower 8mm. I charged the battery for 15 minutes with 10 amp.
When reconnecting the battery ground, I notice pop sound, couldn't recognize if it was from the cabin or the engine zone. the first bad indication was the front trunk light didn't turn on. Then I turned the ignition switch, but nothing happened, no cabin or instrument lights, no stereo, no buzzer, no even the honk works, of course no engine starting.
Then I disconnected the battery and checked voltage 12.2 V, I have checked all fuses front and engine zone, checked ignition switch is connected.
Any ideas?
911 SC 1982 Targa.