Is it possible to connect this Bluetooth speaker and this sub?

[JacobGunther12]

Ignore this post, I've just recently got some new speakers to actually go with my receiver. Thanks, anyway!

 

If you still want to read my post:

Spoiler

 

I have a Bose SLIII bluetooth speaker and a Velodyne CT-150 (discontinued). Here's the inputs/outputs:

 

Bose SLIII:

• Auxiliary Input
• Service USB-C
• Power Adapter

Velodyne CT-150:

• RCA Composite Input
• RCA Composite Output
• Raw Direct Wire Input
• Raw Direct Wire Output

Cables I can use:

• 3.5mm Auxiliary Male to RCA Composite Male (only 1)
• TONS AND TONS of Component Cables
• RCA Composite to RCA Composite (Male) Cables (a lot of them)
• If you suggest some, I can probably say I have it

Is there any way I can hook up the Bluetooth speaker (Bose SLIII) and the subwoofer (Velodyne CT-150) together. I would like to use Bluetooth but that seems near-impossible since my bluetooth speaker doesn't have an output. I also have a receiver (aka stereo) but I would like to stay away from that. Just to be clear, the outputs on my sub don't output the original signal, it outputs what passes through Low Pass.