Take the amp out of line 338. You are on the verge of ruining the entire amp and possibly your radio. If you look very closely at the photos you posted you will see that the board got so hot it actually melted solder and also looks like it may have taken a couple of traces with it. Right by the relay and the also near the coil. And I also see you have possibly damage the keying circuit as well. So best thing to do is take amp out of Service!!! JMHO. Send it to a good amp tech. There is one here on the forums you can PM and see if he will work on your amp. Ask politely and he might do it! Crusher is his user name. He is a good amp tech and will fix the issues if possible!! The main thing is the transistors, hopefully you didn't blow one of them. Doesn't sound like it yet, but you keep keying that amp up and it will end up letting the smoke out fully next time.
Lesson well learned!! Always double check things before you click the amp on and just start talking. Especially if you have been moving equipment around! And leave an swr/power meter hooked up after the amp Always!! This will let you know right away if there is an issue.
A decent cross needle meter for VSWR/power would work well for what you need. This way you can monitor both VSWR and output power at the same time. Again these are JMO's and some may disagree. But I'd take the amp out of line and have it looked at by a good amp tech at least. Don't have to be Crusher, but at least someone that knows WTF they are doing!! I just know that Crusher is one of the few that actually knows what he is doing and he don't need no stinkin You Tube Vid for that LOL!! He actually fixes shit, not in it to try to be an actor if you get what I am saying!! Anyway, again, JMHO, but again, I would pull the amp out of line and shelf it until you can have it looked at by an amp tech. Good luck and don't let the smoke out!!