battery connection screw up Options

[dt4]

I have had the battery off the car whilst stripping paint and priming etc.... but thought it would be good to turn the engine over and run it for a while to keep things in good health etc.....
I had the battery on the bench to charge it and then put it back in the car but very stupidly put the negative lead to positive terminal and positive lead to negative terminal.
I didnt turn the key as I was checking other things when I realised what I had done.
I noticed that there was a smell of smoke coming from the alternator area and the tin on top of the engine in that area was warm so suspect there is a connector to the alternator under there?

I put the terminals on the right way around and tried to start the engine but it appeared the battery had drained?

I recharged the battery overnight but wouldnt start, again the battery seemed low on charge
Apart from seemingly screwing the battery, is there other damage likely to have occured

cheers
David

[dt4]

out of curiosity i tried the jumper lead from the battery negative to the connection bolt on the inner wing and there was clearly a poor connection as the starter struggled to turn over but it fired up pretty quickly once I earthed to the engine
The bolt and surrounding area on the inner wing are all nice and clean bright metal so thats puzzling