Its at the inlet supply hose for the water pump. You can unscrew the cap my hand and remove / clean screen. Mine was hidden under the electrical wires since my fuse box is located in the same spot.
Turn water off first (knob right next to water tank so it dont leak much). Use a rag or two to soak up water.
2017 Axis / 25.4: Big Foot Levelers, Aims 1200 Watt inverter, Ceramic Window Tint, Full River AGM 6V batteries, Front Hellwig Sway bar / Rear Track Arm, Safe T Plus Steering Stabilizer, PD 4655 converter, Hard Wired Surge Guard, WEboost + WiFi Ranger, LED Headlights/Driving lights, Fresh water surge tank, Black Tank Tornado flush, 4999 zip ties.