2006 Freightliner Columbia burnt terminals

Have a 2006 Columbia. Had a mouse get in the fuse panel on passenger side. Guessing it pissed on the connection circled in picture and in turn shorted out and melted the bottom right hand side 3 or 4 terminals in this plug leading to no gauges with the exception of air pressures nothing else. Any suggestions on fixing this or do I need a new panel and plug end? What is this plug called?thanks in advance

 

How hard is it to install a new block? I haven’t pulled it out yet to see what’s all involved? And the plug end itself with all the wires is shot as well. Could I cut and splice all the wires to a new connector?

 

i found a fuse block and got it put in in today with everything wired up. Now im having an issue where the gauges come on with the ignition off. i can start the truck but can not turn it off via the key. also no hvac controls. evertyting else seems to work lights/whipers ect. Tried another ignition switch same result. Maybe the box in the B pillar? I havnt checked that yet

 

Still no luck everything in the b pillar box looks good. Added fuses to the black spots as my tuck only had fuses for the abs. My original fuse block was PN; A06-48433-000. The dealer says the updated part is A06-40943-000 witch i found one out of another truck with a sleeper. my truck is a day cab. there is no ign relay on the new block itself or the 5 amp fuse for the hvac. my wuestion is are they even compatable? there is a hvac fuse and ign fuse in the bpillar box im thinking im missing some wires if the new pcm is supposed to communicate with the b pillar box?