Don't have a pix but my 'new' filling rig is a fuel pump from, I believe, a Volvo that the local garage was trashing due to corrosion on the canister causing it to suck air.
Patched that with a sealant!
It is 12VDC, has 1/2" suction and 1/4" outlet.
I press fitted a 30" length of rigid tubing over the inlet, sealed it and plumbed about 4 ft of outlet hose to the outlet.
Wired a switch in-line for fast shutoff when tank is full.
Note that I have an external 12 volt receptacle mounted for easy boosting purposes, so plug in is simple.
With this rig I simply poke it into any container conveniently on ground level and watch that I don't overfill.
Not super fast, but clean, neat and convenient.