You say the battery exploaded.. I have a guess or 3.
Most rigs have two "Usual suspects" and of course there is always the 3rd but hopefully you did not do that one.
Usual suspect #1.. Disconnect switch.. ON or OFF?
Usual suspect #2 (Prime suspect) circuit breaker or master fuse.
These come in several fllavors....
Many rigs have the common little metal can with two studs in plastic self-resetting breaker somewhere near the battery.. This is about the size of an old fashion ice cube (not the modern mini-cubes of today) Sometimes they fail.
Another type is a pair of POST TYPE breakers on the bottom of the battery control center.. Inteltec shows these in the schematic for my battery control center but.. NOT THERE.
You push UP on the posts.. And I am told to push hard.
I have a somewhat larger than an Ice cube 80 amp plastic encased thermal self-resetting breaker next to the BCC.
And some rigs have fuses.. It may be near the battery or it may be on the 12 volt distribution panel (Magnetek converters have them there, I Suspect some parallex do too)
You will need, a test lamp. Since you taught I won't bother with all the details but I used a socket (With two leads) for a license plate lamp.. (Blade style bulb) and bulb, Some more wire and a couple of test clips completes it.
FOLLOW your 12 volts.. Start at the battery, Clip to positive and negative LIGHT is good, Dark is bad I expect light
Now move one clip to the chassis .. Still light.. GOOD, move out along the POSITIVE lead to the next terminal, and the next, and the next till you no longer "See the light"
Since you taught I do not thing I need to tell you the problem is between the last bright terminal and the dark one