Once fitted they will take up any slack between the battery and battery connection giving you a safe and firm connection.
eBay
Hifi 2/4 Bit Square Aluminum Blank Terminal Plated Binding Post Speaker Board Sound Plug Connector Junction Box Audio DIY Parts
Aliexpress UK
Fiber Washers Digital photos will be required for all cases.
eBay
Square Speaker Terminal Binding Post Block Black Acrylic Junction Plate For Hifi DIY Home Sound Audio System 2 Position 57×57mm
Aliexpress UK
Suitable for most types of batteries. Trailer Hitch. Anti Slip Mat. Steering Wheel Cover. 1x Red Battery Anti-Corrosion Washers. 1x Green Battery Anti-Corrosion Washers. Rear View Mirror.
eBay
HIFI 4Pcs Gold/Rhodium Plated Copper Speaker Binding Post Female Banana Connector HIFI Audio AMP Banana Plug Socket Terminal
Aliexpress UK
Solder / Crimp (Cable can be either crimped or soldered). Ring or crimp (Suitable for up to 20mm2 cables). Screw (Cable is held down by 2 screws). SELECT FROM THE FOLLOWING TYPES Light Duty - 9.5mm cable entry.
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LUSYA 2-Way Audio Speaker Binding Post Crystal Copper Wiring Terminal Box Banana Plug Connector For HiFi Amplifer DAC
Aliexpress UK
Material:Zinc alloy. They do fit any type of power sport batteries. Thread dia:8mm; Thread length:10mm; remark positive (+) or negative (-) at the bottom;positive (+) dia.:17-19mm; negative (-) dia.:15-17mm.
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Hifi DIY Square Speaker Terminal Binding Post Block Black Acrylic Junction Plate For Home Sound Audio 2 Position 92×80mm
Aliexpress UK
For car, truck, van, lorry, etc.
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WBT Style Binding Post Brass Gold Plated WBT Style Terminal Connectors Speaker For Hifi Fever Amplifier DIY Sockets
Aliexpress UK
Feature:Battery terminal connectors are made of brass material, which has better corrosion resistance, with strong electrical conductivity.It is universal used for automobiles, cars, boats, RV battery terminal connectors.Easy to intall and connect,no need other special tool.Specification:Material: Brass, Iron, Aluminum AlloyColor: Brass ToneOverall Size: 23x31mm / 0.91"x1.22"(W*H)Internal Thread Size: M6External Thread Size: M6Battery Terminal Diameter: 18.9mm / 0.74'', 17.8mm / 0.70''Package Included:1 Pair x Battery Terminal Connectors.
eBay
2-10pcs Gold Plated Amplifier Speaker Terminal Binding Post Banana Plug Socket Connector Suitable for 4mm Banana Plugs
Aliexpress UK
Feature:Battery terminal connectors are made of brass material, which has better corrosion resistance, with strong electrical conductivity.It is universal used for automobiles, cars, boats, RV battery terminal connectors.Easy to intall and connect,no need other special tool.Specification:Material: Brass, Iron, Aluminum AlloyColor: Brass ToneOverall Size: 23x31mm / 0.91"x1.22"(W*H)Internal Thread Size: M6External Thread Size: M5Battery Terminal Diameter: 18.9mm / 0.74'', 17.8mm / 0.70''Package Included:1 Pair x Battery Terminal Connectors.
eBay
1pc Dual Female Speaker Banana Plug Gold Plating Post Terminal Connector Banana Socket Amplifier Adaptor D5
Aliexpress UK