Been a few years now, but pressure refueling etiquette is to give the tanker or rig driver your calculated uplift, in volume litre/gallons which would need a conversion chart from Kg/lb against his relative density; you need to climb aboard most hydraulic lift rigs with the driver whom might have his hoses to connect, not likely you would mess with them, they have shear necks and other features; the trick is not to shut off all the aircraft fueling valves at once or even the the last one as this causes a back pressure to the Refueler, but signal to him to slow down or cut his pressure.
A colleague of mine transiting a large Indian East coast airport climbed the loaned steps, to set the wide body refuel panel only to find himself on the concrete with a broken leg.
Climbing equipment has a peril a pilot should avoid.