I'd like to solder several stranded wires of a cable (maximum 18 VDC) to a PCB. I've got corresponding THT holes (⌀ 0.8 mm; it's the eight holes underneath the yellow wire,) but the wire is thicker (⌀ 1.1 mm.) What makes my issue more complicated is that the board is to be part of an automotive electronics solution which must withstand slight shocks. See the picture below:

What is a good method to solder these wires durably to the PCB?

I'd like to solder several stranded wires of a cable (maximum 18 VDC) to a PCB. I've got corresponding THT holes (⌀ 0.8 mm; it's the eight holes underneath the yellow wire,) but the wire is thicker (⌀ 1.1 mm.) What makes my issue more complicated is that the board is to be part of an automotive electronics solution which must withstand slight shocks. See the picture below:

What is a good method to solder these wires durably to the PCB?

UPDATE: Here is a close-up of the eight soldering holes (J9) in question. The PCB is very cramped as J9 is situated between the amplifier in front and the resistors and caps behind it:

I'd like to solder several stranded wires of a cable (max. 18 VDC) to a PCB. Now I've got corresponding THT holes (⌀ 0.8 mm; it's the eight holes underneath the yellow wire), but the wire is thicker (⌀ 1.1 mm). What makes my issue more complicated, is that the board is to be part of an automotive electronics solution, which must withstand slight shocks. See the picture below:

So, what is a good method to solder these wires durably to the PCB?

I'd like to solder several stranded wires of a cable (maximum 18 VDC) to a PCB. I've got corresponding THT holes (⌀ 0.8 mm; it's the eight holes underneath the yellow wire,) but the wire is thicker (⌀ 1.1 mm.) What makes my issue more complicated is that the board is to be part of an automotive electronics solution which must withstand slight shocks. See the picture below:

What is a good method to solder these wires durably to the PCB?

I'd like to solder several flex wires (not solid wires) of a cable (max. 18 VDC) to a PCB. Now I've got corresponding THT holes (⌀ 0.8 mm; it's the eight holes underneath the yellow wire), but the wire is thicker (⌀ 1.1 mm). What makes my issue more complicated, is that the board is to be part of an automotive electronics solution, which must withstand slight shocks. See the picture below:

So, what is a good method to solder these wires durably to the PCB?

I'd like to solder several stranded wires of a cable (max. 18 VDC) to a PCB. Now I've got corresponding THT holes (⌀ 0.8 mm; it's the eight holes underneath the yellow wire), but the wire is thicker (⌀ 1.1 mm). What makes my issue more complicated, is that the board is to be part of an automotive electronics solution, which must withstand slight shocks. See the picture below:

So, what is a good method to solder these wires durably to the PCB?