Good morning,
So you think get the below to complete the system?
Wires x2 ( battery to inverter and battery to controller) https://www.amazon.com/dp/B00SFXV7BA/ref=cm_sw_r_apa_i_JW6J83P7KBYXZ07A7ADR_2?_encoding=UTF8&psc=1
Fuses
https://www.amazon.com/Dual-Terminal-Fuse-Block-Battery/dp/B075ZGR96T/ref=sr_1_4?crid=31EABKQBU0GEL&keywords=Battery+post+fuse+holder&qid=1656467093&sprefix=battery+post+fuse+holder%2Caps%2C63&sr=8-4