RD2811 - Battery Through Bulkhead Connector from Rally Design
Battery Cable Flanged Bulkhead Connector + Insulator Boot - Heavy Duty Weatherproof 12V Copper Core 3/8 Post, 550 Amp Max Rating – for Marine, Solar, Car Audio - Made in the USA (
Thru Panel Battery Cable Bulkhead Connector Negative Black 3/8'' Terminal Post | eBay
Red Battery Terminal Bulkhead Feed-Thru Panel Positive Connector Post 3/8" Stud | eBay
Battery Cable Flanged Bulkhead Connector + Insulator Boot - Heavy Duty Weatherproof 12V Copper Core 3/8 Post, 550 Amp Max Rating – for Marine, Solar, Car Audio - Made in the USA (Red) : Amazon.ae: Electronics
Auto Battery Terminal Bulkhead Feed-thru Panel Positive Connector Post 3/8" Stud | Fruugo UK