Need to replace the battery on my 95. Went out to remove the old battery and found that, when I turned the nut, the stud turned with it. So it's rusted away from the car. If I try to pull up, it won't come out; it's holding on to the car. So.....

1. What can I do remove that plate to get the old battery out?

2. What can I devise the hold the new battery securely? I imagine the right way to do it is to weld in a new stud. I'm in search of the cheap-yet-safe-and-secure approach.

Thansk.

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 158k miles
06 E320 CDI "Rutherford", Black on Tan, 177k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 144k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 72k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife