Electronic – Rotary Switch terminology

The rotary switch under discussion is typically used for preset / factory setting or maintenance purposes - such as for setting a part of a device address, a configuration value to be read during device operation, or selection of power path for enabling one of several circuit sub-sections.

The particular part you have selected has silver-plated copper contacts (Q suffix) for power routing, rather than low-level signal routing or configuration setting.

The lack of available knobs for this type of switch aligns with the design goal of not making it convenient for end-users to make changes - like having a sticker "No user-serviceable parts inside".

For a hand-actuated equivalent, look for flatted actuator, or knob actuator designs. Some thumbwheel actuated designs are also very cost-effective, especially on eBay or other such sites.

A quick search indicates you may be able to find thumbwheels cheaper than the device you have selected, if 10 positions are not a firm requirement.

Another reason for going with thumbwheels is that they are less obtrusive than knob / shaft devices, hence allowing sleeker enclosures!

Terminals 1 and 3 are the common terminals of a DPDT switch. The motor connects there. To form a bridge with the other throws of the switch, you need to connect the positive supply to 6 and the negative supply to 10. Connect a dual-color 2-lead LED with current limiter across 2 and 4 to give a power and direction indicator.