80A hydraulic system circuit breaker.
If you follow the fat red wire from the battery box (bottom right) it goes to the first breaker left post. Then you have a short 3" jumper to the 2nd breakers right post. On this post put a short 4 gauge cable to the new 80A self resetting circuit breaker. On the other post of the new 80A circuit breaker place the cable that goes to the hydraulic motor dual polarity solenoid.
So electrically speaking, the 80A is tied to the battery + post. By doing this you have placed the hydraulic system on its own circuit breaker without changing anything else.
No need to actually replace the existing 50A one. Just put a short 4 gauge jumper from the + side (battery feed side) of the existing 50A breaker to the 80A one then put the cable from the hydraulic pump dual polarity solenoid to the other side of the 80A breaker.
80A circuit breaker
This is a link to the Automatic reset one (in the picture)
Bussmann CB181F-80 80 Type I Flush Mount High Amp Circuit Breaker, 30Vdc.
https://www.amazon.com/dp/B008QDI9HY..._7B0oEbRQQ00AE