Did some research and decided not to go for the common fuse/relay module in the market.
Ended up with littelfuse’s PDM system to approach the electrical.
I got the HWB18 and parts from mouser.sg, shipped free. Cost me approximately $65.00 a set without fuse. The HWB18 is still not as compact as I hoped for but the quality is definitely well built.
The idea for this PDM will power BLUESEAmy after market horns and LED spot lights. I will leave a circuit open for probably external power since my current USB socket that is tapping from the power socket is not supplying enough current to my iPhone 6+. I also want to use this lead for its original intent to power the BLUESEA’s 1045 fast charge 4.8A USB socket.
Anyway, I would still need to plan out how to run the wiring neatly and also purchase the correct sheathing. Stay tune.