Hello, I need some advice/instructions on how to replace some capacitors in a Bogen AP 35 amp. I see the larger paper ones and have spotted a few others that may need replacement. I have a question about the 2 metal cased units in the first photo. I think they are multiple units and replacements are available. My question is how to remove the metal units? I've seen comments about twist lock connections and solder. I would really appreciate some guidance about how to proceed. The unit works now but I think the capacitors should be replaced.